I’m blending a custom texture over Cesium terrain using Material Layer Blend (MLB). The blend is driven by the Z output of WorldAlignedTexture as the alpha in a Lerp. However, black spots consistently appear on the terrain where the texture is blended.
The black artifacts are not caused by zero or missing alpha, they persist even with clean alpha values and static blend weights. They only occur during runtime blending over Cesium terrain using MLB and WorldAlignedTexture. Please find the attached screenshots.
What could be causing this? Has anyone encountered this with Cesium tilesets or MLB-based material blending?