Here are example photos.
As you can see, the problem is that the bottom of the MeshPart is lit brightly, while the top is shadowed. The Lighting object of this place has not been modified from the default settings.
If the meshes are needed for any sort of verification, they can be obtained here.
Could it be because I had to mirror and flip the normals of the mesh? (i.e., Roblox’s lighting system believes it is inside out?)
Voxel lighting is stuck to a 4x4 grid. Try resizing it to see if you still have the problem. If you do, you can go into blender and mess with how lighting is calculated on the surfaces.
If you open it up in Blender, there should be a small + at the top-right of the 3D viewport. Drag it to the left to get a pane that gives you all kinds of info about the scene/mesh. Select the mesh, go to edit mode, and scroll down in that pane and click the vertex button:
Share a screenshot of the mesh with normals being rendered.
After more looking, here’s some further screenshots after experimenting more in Blender… and coming up with nothing.
A Mesh Divided
Extruded, not single-sided
Using -1 Z instead of mirroring
I have figured out a solution. After mirroring or using -1 Z, I had to Apply Scale to the object. Doing so resulted in the model and its lighting being as they should be.
That’s a case that looks like it would be solved by flipping normals.
@0xBAADF00D: Yeah, I’m not sure if it’s Blender’s export or Roblox’s import, but that seems to be where the trouble lies. I’ve also noticed that, when I try to flip the texture of a material in Blender, applying -1 Y to make the texture be read upside down, that setting doesn’t seem to export into Roblox. It renders with the texture flipped in Blender, but not in Roblox.
