Strange Lighting Issue

Unity Engine
1

http://screencast.com/t/tKDwXnPjA

Does anybody know what’s going on in this video? All 3 yellow spheres are prefabs with point lights attached hovering just above the floor, which is a plane with a texture using the diffuse material and a directional light to gently light the areas not light by the prefabs.

When the video starts, all 3 points lights and the directional light are enabled. During the video, you can see that the top and bottom spheres look like they are producing no light, but when I disable the center one, they do (this also happens when I disable any one of the lights - the other two work - but I can’t seem to get them all to look right when they’re all enabled). Can anyone explain this?

I’ve triple-checked all their properties and they are identical (again, they are prefabs that have been reverted to match the blueprint prefab). I thought maybe it was an issue where they were too close together, but turning off the top or the bottom has the effect of making the other two work, so that’s not it. I also thought it might be a number of lights limit, but I know I can get at least 2 point lights and the 1 directional light affecting the floor, so that doesn’t seem to be it either (or if it was, why aren’t 2 lights working when the video starts?).

2

I’ve had a similar issue before with lights. It turned out that I had the lights too close the the mesh and thus there was some z-order issues. Maybe try moving the lights to be a little further away from the plane with the brick texture on it? Its a little hard to see how close your lights are to the mesh to tell if that may be the issue but may or may not solve your issue.

3

Thanks so much for the response. Unfortunately, that was not it - the lights are attached in the center of the yellow spheres and the bottoms of the yellow spheres are above the brick plane.

4

Try setting each light’s render mode to important and check your quality settings.

5

Setting the render mode to important fixed it (I guess that makes sense, it was probably thinking there’s already a light within a certain range, so disable the others - I am surprised I’ve never come across this before). Thank you so much!