Lighting needs to be rebuilt

Development Rendering
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1

i have an issue i cant solve.

Everytime i rebuild the entire scene (including lights) is fine in windows, but once i export it to Android says lighting needs to be rebuilt and of course, everything is black so no lightmass arrives to android.

i´ve tryed a bunch of settings and building options but nothing helps, what can it be?

2

do you have a lightmap importance volume in your level?

3

Yes i do, the lights are looking as i want to, no artifacts and with reasonable build times (1.5 hours aprox).

i readed in other topic that making a big lightmap importance volume outside your actual lightmap importance volume worked, i havent tryed really because it doesnt sound like a solution that might work…