Check the brush surface details. Simply select the surface and change the tiling of the Texture. (here is a small other post on it: https://answers.unrealengine.com/questions/37872/bsp-pan-and-uv-scale-issues.html)
and here is a video on BSP's:https://www.youtube.com/watch?v=Y5HKJyiPDVo
Here is a written description of BSPs and their use https://forums.unrealengine.com/showthread.php?1652-BSP-Brush-vs-Static-Mesh
The reason this happens is that The surface brush has its own UV's. UV's tell a texture how to fit on a mesh or surface. Your mesh simply has a different set of UVs than your Brush. But UE4 brushes allow you to change their UV's on the fly.
answered Sep 12 '16 at 07:19 PM
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