Static mesh turning black after light build
Hi, I have problems with a static mesh tree object going black, I've tried many of the suggestions from other people having this problem but none have worked, this is with static directional light, static skylight and a static object. The lightmap is placed in UV channel 1 (as it should be ?) and a normal UV in channel 0.
this is what I have done so far :
Some things I noticed:
All this leads me to believe its a light-map problem? so I tried adjusting the light map UV's by taking original UV's(which were overlapping on purpose (image1)) and making them fit 1,1 uv range with no overlaps(image2) still didn't work .
The material is just a two sided foliage material that I apply in the engine, so I don't believe this is the problem.
I'm probably missing something obvious in the workflow, would it be possible for someone to take a look at the object and try and import it to UE4 ? https://www.dropbox.com/s/qcoe0k3geoabkmw/treemodel.fbx?dl=0
edit: the images below look fine because they are using dynamic lighting in the preview window. once I build them they go black.
I'm not sure if you could do this... this lightmap... :S I think I've read it somewhere that 1 or 1> pixel uv islands won't get ANY lightmap information! So with this lightmap you should have a really big resolution to have proper padding between the islands + have enough pixels/island to get light information...
Have you tried a 2 sided foliage material already?
I would try to use (distance field) ambient occlusion to light it up nicely...
answered Nov 15 '17 at 03:49 PM
You either have to make a new Lightmap UV with a 3d modeling tool, or you can set your object to moveable that way it should not use any lightmap information but will be worse for your performance.
answered Nov 15 '17 at 04:02 PM
Open it in the mesh editor, and change the Light Map Resolution to 512 and the Light Map Coordinate Index to 1. This worked for me: https://learnunrealengine.com/fix-mesh-turning-black-issue-ue4-geometry-brush-converted-static-mesh-turns-black-building-lighting/
answered Feb 16 '18 at 05:28 PM
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