Using Build button breaks static meshes.
I had a simple level and at some point I desided to add a light to it. But after adding few spot lights - each time then when I rebuilding light it totaly breake meshes. Below are 2 screenshots
If I only move-resize any mesh - everything gets back to normal. But this behavior is kinda annoying. I tried to restart editor but this does not helps. I removed all light expect default
Just to give you a heads up I've edited the questions title since it's not related to lighting. When you use the Build button in the tool bar it is also building the geometry (BSP) in the scene as well and not solely lighting.
In regards to what you're seeing this is a known issue with BSP and using a lot of them in the scene. There are two similar issues that have been reported with UE-12157 and UE-15621.
Both of these issues are backlogged at the moment. There is no guaranteed time line for when these will be addressed.
answered Jun 30 '15 at 03:24 PM
Tim Hobson ♦♦ STAFF
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