We are seeing visual defects in materials applied to some imported .fbx models when rendered in UE4 4.4.
These materials render perfectly in both Modo and Maya.
This occurs with both Planar and “automatic” UV Mapping.
It occurs with both “substances” and Materials based on .png textures.
Here is an example circular model with a grid material and the defect is visually obvious:
You are having an issue with your vertex triangulation in the mesh. This triangulation is causing your material to distort. There is a great explanation and example of this issue in the Forums by my colleague Tim Hobson, Random Streaks In Mesh - Asset Creation - Unreal Engine Forums
Take a look at that and let me know if you have any further questions -
Actually, this link you posted does explain the problem pretty clearly.
But, we were not able to get the fix to work as described.
The actual fix for us was: Open the Static Mesh in Unreal, and at LOD Element 0 , in the build setting drop down…
Use Full Precision UV was not selected.
This needs to be selected, and the problem was fixed.
