Version: 2018.1 (switch to 2018.2b or 2017.4)
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Shader Compilation Target Levels

When writing either Surface Shaders or regular Shader Programs, the HLSL source can be compiled into different “shader models”. To allow the use of more modern GPI functionality, you must use higher shader compilation targets.

Note: Using higher shader compilation targets may prevent the shader from working on older GPUs or platforms.

Indicate the compilation target by using the #pragma target name directive. For example:

#pragma target 3.5

Default compilation target

By default, Unity compiles shaders into almost the lowest supported target (“2.5”); in between DirectX shader models 2.0 and 3.0. Some other compilation directives make the shader automatically be compiled into a higher target:

  • Using a geometry shader (#pragma geometry) sets the compilation target to 4.0.
  • Using tessellation shaders (#pragma hull or #pragma domain) sets the compilation target to 4.6.

Any shader not explicitly setting a function entry point through #pragma for geometry, hull or domain shaders will downgrade internal shader capability requirements. This allows non-DX11 targets with broader run-time and feature differences to be more compatible with the existing shader content.

For example, Unity supports tessellation shaders on Metal graphics, but Metal doesn’t support geometry shaders. Using #pragma target 5.0 is still valid, as long as you don’t use geometry shaders.

Supported #pragma target names

Here is the list of shader models supported, with roughly increasing set of capabilities (and in some cases higher platform/GPU requirements):

#pragma target 2.0

  • Works on all platforms supported by Unity. DX9 shader model 2.0.
  • Limited amount of arithmetic & texture instructions; 8 interpolators; no vertex texture sampling; no derivatives in fragment shaders; no explicit LOD texture sampling.

#pragma target 2.5 (default)

  • Almost the same as 3.0 target (see below), except still only has 8 interpolators, and does not have explicit LOD texture sampling.
  • Compiles into DX11 feature level 9.3 on Windows Phone.

#pragma target 3.0

  • DX9 shader model 3.0: derivative instructions, texture LOD sampling, 10 interpolators, more math/texture instructions allowed.
  • Not supported on DX11 feature level 9.x GPUs (e.g. most Windows Phone devices).
  • Might not be fully supported by some OpenGL ES 2.0 devices, depending on driver extensions present and features used.

#pragma target 3.5 (or es3.0)

  • OpenGL ES 3.0 capabilities (DX10 SM4.0 on D3D platforms, just without geometry shaders).
  • Not supported on DX11 9.x (WinPhone), OpenGL ES 2.0.
  • Supported on DX11+, OpenGL 3.2+, OpenGL ES 3+, Metal, Vulkan, PS4/XB1 consoles.
  • Native integer operations in shaders, texture arrays, etc.

#pragma target 4.0

  • DX11 shader model 4.0.
  • Not supported on DX11 9.x (WinPhone), OpenGL ES 2.0/3.0/3.1, Metal.
  • Supported on DX11+, OpenGL 3.2+, OpenGL ES 3.1+AEP, Vulkan, PS4/XB1 consoles.
  • Has geometry shaders and everything that es3.0 target has.

#pragma target 4.5 (or es3.1)

  • OpenGL ES 3.1 capabilities (DX11 SM5.0 on D3D platforms, just without tessellation shaders).
  • Not supported on DX11 before SM5.0, OpenGL before 4.3 (i.e. Mac), OpenGL ES 2.0/3.0.
  • Supported on DX11+ SM5.0, OpenGL 4.3+, OpenGL ES 3.1, Metal, Vulkan, PS4/XB1 consoles.
  • Has compute shaders, random access texture writes, atomics etc. No geometry or tessellation shaders.

#pragma target 4.6 (or gl4.1)

  • OpenGL 4.1 capabilities (DX11 SM5.0 on D3D platforms, just without compute shaders). This is basically the highest OpenGL level supported by Macs.
  • Not supported on DX11 before SM5.0, OpenGL before 4.1, OpenGL ES 2.0/3.0/3.1, Metal.
  • Supported on DX11+ SM5.0, OpenGL 4.1+, OpenGL ES 3.1+AEP, Vulkan, Metal (without geometry), PS4/XB1 consoles.

#pragma target 5.0

  • DX11 shader model 5.0.
  • Not supported on DX11 before SM5.0, OpenGL before 4.3 (i.e. Mac), OpenGL ES 2.0/3.0/3.1, Metal.
  • Supported on DX11+ SM5.0, OpenGL 4.3+, OpenGL ES 3.1+AEP, Vulkan, Metal (without geometry), PS4/XB1 consoles.

Note that all OpenGL-like platforms (including mobile) are treated as “capable of shader model 3.0”. WP8/WinRT platforms (DX11 feature level 9.x) are treated as only capable of shader model 2.5.

See Also


  • 2018–03–20 Page amended with editorial review
  • Shader #pragma directives added in Unity 2018.1 NewIn20181
  • Tessellation for Metal added in 2018.1

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Shading Language used in Unity
Shader data types and precision