I want to sometimes load a floor mesh that does not render anything but still collides with the camera. At first I thought just use a PNG texture with full alpha=0 for transparency. But it still renders something. We figure it’s a light/shadow issue.
So I added the mesh to all of my lights’ mesh exclusion lists. Here’s where it gets weird. Despite having 4 lights (2 dir, 2 hemi), if I add the floor to even one light’s exclusion list, the floor disappears completely - including lack of camera collision.
Ive also tried:
disabling the material on the mesh (it still renders some kind of default grey plane with specularity),
setting mesh.visibility=0 (visually it works, but it also disables camera collision)
Functionally, we always want a floor at z=0 whether there’s a visual component or not, I just want the floor invisible in certain cases.
What am I doing wrong?
EDIT: I did just find a kind of solution. Set the ground mesh material disableColorWrite=true. But that seems an awkward way of doing it.