Strange material effect on IOS UE5.7

Hi @SkecisAI, welcome to the community!

It’s hard to tell what’s going on from your screenshot. Can you tell us more about which tilesets you’re using? It’s a bit of a guess, but it looks like there could be two tilesets occupying the same horizontal space and depth fighting, but that’s really only a guess. Any further information you can provide will help us get to the bottom of this.

Hello! @Kevin_Ring , thanks for your reply!

The tilesets is from converted OSGB file. And I tested the tileset on unreal on PC, Android,MAC and IOS. Only IOS(IPhone16, IPad 13-inch)showed like this. I tried to change the CesiumBaseMaterial to keep only basecolor texture. But the result is the same: when move the camera away from the tile, the tile become white or like some emissive color

Thanks for the additional detail @SkecisAI. I’m unfortunately still at a loss for a possible explanation, though. Are you able to reproduce the problem:

  1. With different tilesets?
  2. With the Cesium for Unreal Samples project?