We’re using custom shader for making shadows from movable directional light on a plane with unlit material. Here is the code:
float s = Texture2DSampleLevel(LightAttenuationTexture, LightAttenuationTextureSampler, UV, 0).x;
s = saturate(s);
return float4(s, 1-s, s, s);
Last engine’s version where it works properly is custom dev-ar-kit branch. After release of 4.17 and 4.17.1 LightAttenuationTexture looks like garbaged data or some another texture from memory and depending on camera position.
LightAttenuationTexture is only bound when using the deferred or desktop forward renderer which explains why you’re getting junk data.
There should be a way to lookup the CSM shadowmap data with the mobile renderer which should look a lot better than modulated. In MobileBasePassPixelShader.usf, something very similar to all the code in the block under “// Cascaded Shadow Map” should do what you want although you only want the MOVABLE_DIRECTIONAL_LIGHT path, the other case is for blending CSM with lightmaps.
This post is kinda old but will try my luck.
I am having similar issues on my side with mobile builds…zulman, did you guys sort out a solution for that shadow issue?
If so, would love to hear about it!
