Shader error in 'Reallusion/Amplify/RL_SkinShader_Variants_URP'

[dclipca]

Error building Player: Shader error in 'Reallusion/Amplify/RL_SkinShader_Variants_URP': maximum ps_5_0 sampler register index (16) exceeded at line 432 (on gles3)

Building for Android (OpenXR). How do I solve this?

[dclipca]

Only the case for URP. The error doesn't appear when compiling for the standard renderer.

[XiaoMinghui]

@dclipca hi,have you solve this problem now

[dclipca]

@dclipca hi,have you solve this problem now

You got the same issue? I think I might have solved it by disabling fancy skin options (leaving only the basic stuff as the more advanced shader options do not seem to work on Android, VR or both). I switched later custom shader option so my experience with this bug is limited.

[soupday]

I've recently recompiled all the URP shaders with sampler macro's, so they should be using at most only 6 or 7 samplers.
But some versions of GLES on android don't support sampler macros and so the Std_Skin_Head material should only use 13 textures, but the wrinkle map system raises this to 30 textures, which obviously won't fit on these devices.

If that's the case:

1. Don't enable wrinkle maps.
   then
2. Bake the characters materials, this uses only about 6-7 textures per material.
   or
3. Uncheck the "Is Head" toggle in the Head material. This will use fewer textures but have less features.
   or
4. Build with Basic Materials. Everything uses the URP/Lit shader and should work on anything. (if the android target device doesn't support sampler macros then it probably won't perform very well with the full shaders anyway)

There's also the possibiliy that this is a bug in Unity, as some people get this error for no apparent reason. (They have to rebuild the entire project Library to fix it)

[dclipca]

I've recently recompiled all the URP shaders with sampler macro's, so they should be using at most only 6 or 7 samplers. But some versions of GLES on android don't support sampler macros and so the Std_Skin_Head material should only use 13 textures, but the wrinkle map system raises this to 30 textures, which obviously won't fit on these devices.

If that's the case:

1. Don't enable wrinkle maps.
   then
2. Bake the characters materials, this uses only about 6-7 textures per material.
   or
3. Uncheck the "Is Head" toggle in the Head material. This will use fewer textures but have less features.
   or
4. Build with Basic Materials. Everything uses the URP/Lit shader and should work on anything. (if the android target device doesn't support sampler macros then it probably won't perform very well with the full shaders anyway)

There's also the possibiliy that this is a bug in Unity, as some people get this error for no apparent reason. (They have to rebuild the entire project Library to fix it)

How does one disable wrinkle maps? Thank you for the detailed possible solutions.

[dclipca]

Bump.

[soupday]

It's all in the documentation:

https://soupday.github.io/cc_unity_tools/expression-wrinkles.html

Edit: Does it still do this? I cut out even more samplers in the skin/head shader for 1.5.1/1.5.2.

[dclipca]

It seems it's fixed.

[dclipca]

Checked right now.