Unity compiling shader variants standard

Unity compiling shader variants standard. This improves the situation a bit, but still, it could be down to 220kB if I had more control over shader usage/referencing. Universal Render Pipeline/Simple Lit (16 million variants) and Shader Graphs/Standard Vertex Color (6 million variants) I am aware, that there is a general discussion topic about shader stripping In this video, we are going to take a look a t what a "Shader Variant" is and how we can reduce the time it took at the build. A clean build (no Library) takes upwards of two hours on a current-gen six-core i7 -- 100 minutes of which is simply compiling shader variants. Feb 22, 2011 · I pretty much removed all but a few variants form the Standard shader. 1 has a new checkbox in player settings, "Strict shader variant matching", that can be used to alter this behaviour. ShaderVariant); This is an extension method I've made to add the shader variant directly, which bypasses the shader keyword check it seems, but it allows me to add STEREO_INSTANCING_ON keywords which I need when merging two perfectly valid collections together. During this step, a program called a preprocessor prepares the shader source code for the compiler. Here's a thread that has more info on how to reference ONLY the variants you actually use in the project. Dec 20, 2018 · Reducing the number of materials and shader references in each scene seems to speed up the compile process slightly (compiling a shader seems to take longer the first time around, and speeds up on subsequent passes), but if a shader has 10,000 variants, like the Standard shader, it still seems like a crazy amount of processing. This is awesome for writing and debugging shaders. 3. I then see 'compiling compute variants' for many minutes. The number of shader variants that Unity compiles for a shader program is the product of the keyword sets; that is to say, Unity compiles one variant for every combination that includes one element from each set. For general information on variants, see Shader variants A verion of a shader program that Unity generates according to a specific combination of shader keywords and their status. The calculated shader count on the player settings shows 27 but the shader Cash folder has up to 600,000 files. Standard shader (not included): 324kB. I have two uber-like shaders in my game, that are used in every scene. Hello, when I try to build my game, compiling shader variants always takes a long time. Advantages and disadvantages of shader variants. Through this, it has become apparent that it is building over 1 million variants. To create shader variants, you add one of the following directives to your shader snippet: #pragma multi_compile; #pragma multi Aug 11, 2012 · In short, there're 2 main factors could impact the build time. Relevant documentation. Also, there are many internal shaders which you won't use for things manually but which the engine needs to function. Put all of the shaders and the ShaderVariantCollection into an asset bundle. Manually compile all shader variants for a selected graphics API. Keyword変更によるVariant切り替え時にCreateGPUProgramの負荷が出てしまう問題. COLOR_GREEN. Palel July 1, 2023, 5:03am 1. Unless you have included them in the Resources folder. Unity does compile a standard shader which holds “all combinations” or “variants” of features included in the standard material. The main disadvantage of shader variants is that a large number of Mar 22, 2015 · For example, the Standard shader , if fully compiled, ends up being many thousands of slightly different GPU programs. Apr 30, 2020 · I ended up removing the URP and its package. Creating compute shader variants has until now been tedious work of hand crafting different kernels for different variations (by combining #pragma kernel and preprocessor defines) and then manually mapping the correct kernels to correct Jul 3, 2017 · Hello Unity alpha users! By default, when a shader variant is not found in the player build, Unity silently picks a "close enough" variant from the available ones. I had to learn / integrate use of Shader Variant Collections. We would like to show you a description here but the site won’t allow us. It is up to 25% faster than the platform compilers’ preprocessor, closely follows the C standard, and offers new features. Loading large numbers of shader variants during game is slow and takes up memory. Discover the true cost you're paying for the sneaky "shader variants" that Unity creates by default and how to stop paying for it. 2 alpha to beta (initially), it was impossible to get a build to complete for the same reason (too many variants). This creates two potential problems: Large numbers of these shader variants increase game build time, and game data size. Nov 10, 2013 · Yet during a build for Android, Unity informs us it is compiling 200M+ shader variants (I'm assuming M means 'million' here) for every single scene. I have tried applying different URP-shaders to the material and the message appears for all of them in play mode (and nothing renders). EnableKeyword API. Shaders can consist of hundreds or thousands of variants that cover Shaders with a large number of variants are called “mega shaders” or “uber shaders”. . For shader variants that you can’t strip in other ways, you can use the following APIs in an Editor script to perform build-time stripping: IPreprocessShaders. Posts: 26. May 6, 2020 · Unity 2020. Avoid shader duplication in AssetBundles (If you pack something referencing default imported shaders, the shader will be duplicated for each AssetBundle) But this "best solution" is certainly more of a hindsight and does not help your current situation Jan 11, 2019 · Compiling thousands of shader variants is the longest part of the build process - and my project only uses a handful of shaders throughout. For information on how to implement these features in compute shaders, see Declaring Oct 28, 2019 · 2020. Unity’s Standard Shader is an example of such a shader. Setting Project Settings > Graphics > Instance Variants to Strip All. OnProcessShader: receive a callback before Unity compiles a graphics shader Pass into a build. Then, if you don't change LWRP settings, it builds faster, but still takes much longer than when using the Legacy RP. For information on how to implement these features in compute shaders, see Declaring Unity compiles your shader source files into individual shader programs. ShaderVariantが多くために実行時のメモリを多く占有し Jul 1, 2016 · Well this just sucks. Supports a wide range of shader types and combinations. This is what got fixed - Shader Graph now declares the keywords in the same way as URP/Lit. Variants are versions of the shader program that work with different combinations of shader keywords. I have a test HDRP project which contains about 50 Shader Graphs (Lit and Unlit), this option increased the build time from 60 seconds to 85 seconds. May 28, 2024 · Shader variants are generated, based on all possible combinations of shader_feature and multi_compile keywords used in your shader, among other factors. Under Shader Loading, you can see how many shaders and shader variants you have next to Currently tracked:. After you build your project, open the Editor. You configure variants using shader keywords. Write an implementation of IPreprocessShaders. The main disadvantage of shader variants is that a large number of 1. If it uses a handful of variants, you could make it build only those variants that you know you need using the IPreprocessShaders interface. When I upgraded from 2021. Takes forever. The main disadvantage of shader variants is that a large number of May 5, 2014 · Problem is, for a lot of projects, there's very few instances of actually taking advantage of the keywords being multi-compile rather than shader_feature. Mar 9, 2015 · 102. Often it is convenient to keep most of a piece of shader code fixed but also allow slightly different shader “variants” to be produced. Asynchronous Shader compilation prevents the Unity Editor from stalling by rendering dummy Shaders while compiling new Shader Variants. Jun 29, 2015 · The assigned maps can be dummies sized 1x1, but that will include the optional shader variant in the project. To do this: Go to Edit > Project Settings > Graphics. Unity 2022. Shader variant stripping greatly reduces the amount of compiled shader variants, however stripping is currently performed at the end of the shader processing stage. ferRod5, Nov 19, 2021. Kill it and restart the build, without cleaning your Release directory. 1 beta introduces the Caching Shader Preprocessor, a new custom solution to perform this compilation step. compute file or and included . In the Unity Editor, the shader does not compile all shader variants for all graphics APIs until build time. Unity’s Standard Shader A built-in shader for rendering real-world objects such as stone, wood, glass, plastic and metal. Read more on them on their manual page, especially the part about the “Difference between shader_feature and Unity compiles shader source files into shader programs. For more information on how Unity loads and uses shader variants, see Shader loading. The reason I liked Unity over Unreal is that Unity didn't compile loads of shaders. The main disadvantage of shader variants is that a large number of Definition type: “multi compile”, “shader feature”, or “dynamic branch” When you declare a set of keywords, you choose whether to use them with shader variants or with dynamic branching. One of the first steps is preprocessing. Each compiled shader program has one or more variants. Mar 9, 2007 · This would be a very simply workflow: Create all the ShaderVariantCollections for the project by playing the game in the editor, using Settings / Graphics / Save to Asset (after clearing / tracking the shaders and shader variants). This resulted in a huge amount of shader variants to support those features. ago. It does this via the #pragma multi_compile and #pragma shader_feature directives. When building asset bundles, inject the common shader asset bundle dependency. Dec 23, 2016 · Compiling 16848 shaders. log log file and search for Compiling shader to see which variants Unity compiles and strips. May 3, 2018 · So that you can: Have 100% control over built-in shader. #14. Mind you, just tried one of my own PC games that I updated from Unity 2018 to 2019 LTS and I don't get this problem with millions of standard shader variants. Another way would be to make a copy of the standard shader and change shader_feature to multi_compile where you need the different shader variants to be available. COLOR_BLUE. When the game starts, load the common shaders asset bundle and warm up the ShaderVariantCollection. To ensure that these variants don't add to build times, file size, and runtime memory usage, we have expanded URP's shader stripping capabilities. Anyone who uses Unity deals with shaders, directly or indirectly. I mentioned about several impor Jan 23, 2013 · Sure. Player build time and data size increase along with the complexity of your project because of the rising number of shader Dec 23, 2016 · Compiling 16848 shaders. This has a potential to hide bugs in the keyword setup. It seems to grow with the amount of scenes that you are building. Get a list of shader variants Unity creates at build time. Shader compilation involves several steps. As in, for most of the things I've made, you could look at exactly the shaders variants that are on the materials in the build, and then compile those, idk, 100 shaders in total including Jul 14, 2020 · 106. 2. More info. Aug 1, 2014 · 1,555. OnPreprocessShader () that uses those Mar 26, 2015 · Alright, so thanks to Yanik I was able to research this properly. Removing and adding back in shaders that should always be included in my build. To create shader variants, you add one of the following directives to your shader snippet: #pragma multi_compile; #pragma multi Make shader behavior conditional: Use an if statement in HLSL code, or a pre-processor directive, to mark parts of your shader code conditional based on whether you enable or disable a shader keyword. Please check the Editor log after building the player, it should say per shader pass Feb 6, 2010 · Joined: Jun 12, 2013. Unity におけるシェーダーコンパイルパイプラインはブラックボックスで、multi_compile や shader_feature などのバリアントの前処理命令の収集前にシェーダースニペットを抽出するために、プロジェクト内の各シェーダーがパースされます。 Jul 29, 2016 · Unity never used-to take lots of time to compile Shader Variants at build time at all. There was an issue with the variant stripper that got updated in URP in a way very specific to the keyword setup in URP shaders. Posts: 763. Minutes is really an understatement, but over 30 minutes to an hour for a relatively new project is also a problem. We've got a simple set of lit/unlit URP shader variants we use in the current version of our project. Do I have any options for improving this time? Is it possible to reduce the number of variants that need compilation? I’ve already disabled the “optimise meshes” checkbox which I Select Save to asset… to create a shader variant collection asset. 本文介绍了一种利用Unity的ShaderVariantCollection类来优化Shader变体的收集和编译的方法，提高了游戏的性能和稳定性。 Mar 28, 2017 · Compiling shader variants has practically ground progress on our project to a halt. We have shader cache for variants that have been compiled previously. Read more on them on their manual page, especially the part about the “Difference between shader_feature and multi_compile”. 1 but we still see it in 2018. Aug 7, 2022 · Jussi said: Another thing to check would be if the Unity Editor reports any errors for the URP/Lit shader when you select it in the Editor. Adding a ShaderVariant to preload to my Project Settings > Graphics (at the bottom there is a list for doing so) Unity compiles shader source files into shader programs. Using shader variants and keywords. Unity compiles shader source files into shader programs. This is commonly called “mega shaders” or “uber shaders”, and is achieved by compiling the shader code multiple times with different preprocessor directives for each case. " Jul 7, 2022 · Variant Keyword Prefiltering is a new optimization to the engine's built-in stripping, and will significantly reduce build times due to shader variant processing and compilation. Dec 28, 2018 · It began in 2018. At runtime, Unity uses the variant that matches the current requirements. When a variant is in the cache, it's not compiled again, the data is just being read from the cache. Every time I switched to Unity during a build, it was running this step again: For general information on variants, see Shader variants A verion of a shader program that Unity generates according to a specific combination of shader keywords and their status. – Hristo. For example: Make shader behavior conditional: Use an if statement in HLSL code, or a pre-processor directive, to mark parts of your shader code conditional based on whether you enable or disable a shader keyword. Creating shader variants. You can also use shader variants to change shader behaviour at runtime, by enabling or disabling keywords. Then use this shader instead. I have been trying to build a small game for 10 hours now and the “compiling shader variants” is still at 48411 of 294912 fp which means that it will take multiple days for the build for finish. Using shader variants and keywords Creating shader variants. The Standard shader uses this. For example: Jul 28, 2013 · Nov 17, 2016. The main disadvantage of shader variants is that a large number of Jul 1, 2023 · Compiling shader variants taking days. The main advantage of shader variants is that they allow you to use runtime conditionals in your shader programs, without the GPU performance impact of dynamic branching. Hey, so this looks like a bug with the Scriptable Build Pipeline, or perhaps something deeper in shaders that SBP is trying to do. 3. For information on how to implement these features in compute shaders, see Declaring Feb 11, 2011 · The initial shader build occurs after I add my files - very quick, no errors. Use shortcuts to create keyword sets: Use Unity shader directive shortcuts to create sets of shader keywords and variants. In general, Shader compile times seem to have exploded post 2017. Shader Stripping Improvements in URP. Nov 16, 2014 · Keep removing shaders and keywords OR converting global keywords to local from assets until you get below the 256 max. Select Save to asset… to create a shader variant collection asset. It takes very long only the first time, shader variants being cached in Library/ShaderCache. Aug 29, 2018 · 1. Shader Control will only suggest converting global shader features to local (but not multi_compile keywords) to avoid breaking any asset that can be enabling those multi_compile keywords with the Shader. Keywords marked as multi_compile are always included in your build, while those marked as shader_feature will be included if they are referenced by any material in your project. I've added a script via the Shader Variant API (not sure of official name - but the IPreprocessShaders interface), to inspect what variants it is building. Massively reduce Player build time and data size by allowing developers to control which Shader variants are handled by the Unity Shader compiler and included in the Player data. In previous versions of Unity, the Editor used the preprocessor provided by the shader compiler for the current platform. 3, to the point where we had to remove things like Standard Shaders (anything with thousands of variants) just to get our builds under an hour. For shaders that use #pragma shader_feature, Unity automatically checks whether variants are used. If I make any change, whether to a . 1. Asynchronous Shader compilation is enabled in the Editor settings (menu: Edit > Project Settings… > Editor > Shader Compilation) by default. Some of the things I have tried are making a precompiled shader asset. More info See in Glossary. Since it looks like the build pipeline gets to the WriteSerializedFile steps, I'd just ask if you think there's enough disk space on your machine. Hi, When building my URP 14 project, the "Compiling Shader Variants" tasks takes extremely long for two standard shaders. Jan 5, 2019 · So here's what ended up happening: The variant direction was not the way to go. My project is fairly medium sized and I've tried various solutions with no avail. While building a Player, I observed Unity runs "Compiling Shader Variants" for the same shaders for every scene now, burning precious build time. Add( variant. The Caching Shader Preprocessor. If you choose shader variants, you must also choose how Unity defines the keywords internally; this affects the number of variants that Unity compiles. If none of the Materials in a build use a variant, that variant it is not included into the build. That didn’t help. The main disadvantage of shader variants is that a large number of Shaders with a large number of variants are called “mega shaders” or “uber shaders”. Only compile shaders you used. コンパイル対象のVariantが多くてビルドに時間がかかる問題. 1. • 1 yr. Stripping shader variants using Editor scripts. You can manually force this to check for errors. I also tried removing shaders from the required shader list. Well yes it does. Supports a wide range Stripping shader variants using Editor scripts. Maybe it's an Android thing. This resulted in shaders created using Shader Graph having around 100x vertex variants compared to URP/Lit. Posts: 6,610. See in Glossary source files into individual shader programs. I don’t even have a single light in my scene exept for the sun (because i am Apr 22, 2016 · shaderVariantCollection. For example: Unity’s Standard Shader is an example of such a shader. See internal shader variants documentation. hlsl file this re-triggers 'compiling compute variants'. A Shader object can contain multiple shader variants. The main disadvantage of shader variants is that a large number of Not only that but now client builds also ALWAYS trigger the complete shader variant compilation thing, making a build last hours even if I literally didn't change anything. We use addressables, so the cost of compilation appears to happen twice when we build both. Open the Task Manager and the Unity process and check what it's doing (ie. Unity エディターでは、すべてを先行してコンパイルすることはありません。すべてのグラフィックス API に対応するすべてのバリアントをコンパイルするには、非常に長い時間がかかるからです。 その代わりに、Unity エディターは以下のようにしています。 Oct 9, 2015 · Another thing that I noticed, is that the editor can compile all the different variants of a (compute) shader in the background, but when it detects that a variant is required, it will compile that ahead of the others, so it can be used before all the others are completed. This removed the shader compiling for many of the shaders, but there are still many Standard shaders that still have to get compiled. Edit 2: I did another comparison (different project, so sizes differ a bit). Code (CSharp): Dec 29, 2011 · That's implemented using "keywords", and Unity needs to compile every shader for every combination of keywords it includes. Shaders with a large number of variants are called “mega shaders” or “uber shaders”. stuck/frozen processes). Jan 14, 2024 · Apr 27, 2017. After a few months experiencing with LWRP in VR (Oculus Go), I decided to switch back to Legacy. aleksandrk, May 16, 2021. This didn’t help. "Optimize Mesh Data" (ProjectSettings>Player>Optimization) could increase the build time. 0a9 is out and with it the support for multi_compile directive in compute shaders has arrived. At runtime, when Unity renders geometry, it uses the variant that matches the current requirements. In recent years, URP has grown and introduced a lot of amazing features. May 22, 2020 · ShaderVariantに関連する最適化の話としては、以下の3点があります。. See in Glossary is an example of such a shader. Before as long as I did not change anything very important this would not happen and the build would end in 1 minute. Each compiled shader program has one or more variants: different versions of the shader program for different conditions. Supports a wide range Mar 9, 2007 · This would be a very simply workflow: Create all the ShaderVariantCollections for the project by playing the game in the editor, using Settings / Graphics / Save to Asset (after clearing / tracking the shaders and shader variants). Mar 11, 2015 · Unity does compile a standard shader which holds “all combinations” or “variants” of features included in the standard material. The issue was that I had lag each time a room was streamed in because I was using asset bundles, and I didn't have the shaders I needed grouped in a shared bundle, each asset bundle included the shaders separately meaning each time a room loaded it loaded yet another copy of all the shaders causing that laggy TinyAntCollective. For example, this set contains three shader variant keywords: COLOR_RED. The main disadvantage of shader variants is that a large number of Unity compiles shader source files into shader programs. OnPreprocessShader () that uses those Jan 20, 2019 · 7. May 14, 2018 · Stripping scriptable shader variants. For more information on how Unity loads and uses shader variants For general information on variants, see Shader variants A verion of a shader program that Unity generates according to a specific combination of shader keywords and their status. When selected no message appears. For more information on what the shader compiler does and when, see Shader compilation; Inspect the compiled shader code Nov 3, 2020 · Hello I am making good headway constructing a CI pipeline on Azure but have ran into a pretty major blocker in that compiling the HDRP/Lit shader takes 41 minutes which means we always hit the 1 hour timeout. This means that Unity will not include its default shaders to your project, meaning if you are using some Materials that use the Standard shader for example, it will be missing (pink) when you build the game. kz ta sq mk tu vw ys ij xj go