Hi James, you wrote that the original FBX from RC didn’t have this issue, and only the modified mesh had this issue. If I remember correctly, the decimate tool in Blender preserves UVs, and you also used the smoothing tool.
If the geometry changed even slightly, but the UVs and textures didn’t, I think there might be some edge bleeding. Try to increase the Gutter in RealityCapture. This will increase the padding, and when you slightly modify the geometry, the bleeding shouldn’t be visible.
