I have shadows that show up fine when you place a mesh in the editor but when you build lightning it looks incorrect. I’ve increase lightmap resolution to 256 but it doesn’t seem to do anything. Any ideas? Probably a noob question.
increase your lightmap resolution
The object receiving the shadow is the object that you need to adjust the lightmap resolution for.
I got it all backwards. I thought it was the casting object. Anyway I increased the lightmap on the receiving plane but the shadows were all wonky anyway. I realized that I needed a huge lightmap resolution because the plane was so big. Reducing the receiving object increased a lot the quality of shadows for the same LM resolution.
I imagine when increasing the LM resolution you take a performace hit. What value is ‘normal’ (if that exists) for level architecture objects? Should be something related to the physical size and player closeness?
There’s a quick way to check if the current lightmap resolution for an in-game mesh is set correctly: tap ALT-0 in the viewport to switch over to the lightmap density view mode. Everything should now be colour coded to indicate lightmap density: blue is too low, green is just right, and red is high density. You may see some objects highlighted in orange: this is perfectly fine; they’re dynamic objects that don’t get baked. Tweak your densities in this view mode until everything is at least green then switch back to lit mode and rebuild your lighting.