The integration of custom lighting within a ShaderGraph or HLSL shader can alter the default behavior of alpha clipping, leading to transparency issues when dithering is applied. To resolve this, the AlphaClipThreshold logic must be configured to correctly interact with the dithered noise pattern. 1. In the ShaderGraph settings or your HLSL Properties block, ensure that AlphaClipThreshold is enabled and set to a value greater than 0. 2. Use a Dither node (or a custom Bayer matrix function) to generate a screen-space pattern. 3. Subtract your desired opacity or shadow attenuation from this dither pattern. 4. Output the result into the AlphaClipThreshold port of the Fragment stack. 5. Ensure the SurfaceType is set to Opaque while Alpha Clipping is active to prevent sorting issues associated with Transparent render queues.

This approach ensures that the GPU invokes the discard instruction on fragments that fall below the threshold, preventing the ‘unlit’ ghosting effect where the mesh is still technically being drawn with zero light.

Additional Tips:

• Check that your ShadowCaster pass also implements the same dithering logic to avoid shadow-only ghosting.
• Verify that ZWrite is set to On to ensure the depth buffer is correctly populated for dithered surfaces.
• If using Unity 6, leverage the ScreenSpaceDither node for more stable temporal results in the AlphaClipThreshold.