Weird shadow after building lighting

Development Rendering
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1

Before and after build lightning. Both are set as static lighting. Lightmap resolution for both rocks are at 64.

So far I turn up the lightmap resolution and it did not fix the problem. I did not touch any other setting beside this

260707-lightning-problem.png
260707-lightning-problem.png929×583 366 KB

Lightmap attached if you’re interested. Other info that might be relevant:

  • I made the rocks with Blender
  • I also made the lightmap the same way for both rocks (seam and unwrap)
  • Lighting quality is set as preview
  • Use error coloring box option was checked (if this is the problem I still have no idea what cause it)

260708-lightmap.png

2

SOLVED!

  • I disabled the Use coloring error option box ==> No changes => Not that setting that cause the problem
  • I also copy the mesh for rock 2 and use it for rock 1 (the one that got problem), same problem persist, but
    it means that Blender and light map was not the problem), IT MUST BE THE SETTING
  • Turned out rock 1 “light map coordinate” was set at 0 instead of 1, causing it to shadow bleed on itself. Change it to 1 and it went away.