Strange lighting behavior, not sure what I changed

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#1

I’m on lecture 79, and I’ve applied the rosewood texture to the chessboard surround. When I switched to rendered view, the light was applied in solid patches with a bunch of triangles and grainy bits:

blender - bad lighting
blender - bad lighting1539×649 234 KB

This isn’t how the demonstration looked, and it also isn’t how the cube with the brick texture looked, both in the demonstration and when I did it. So I started a new file, applied the brick texture to a cube, and it rendered fine. I tried the rosewood texture, and it also rendered fine.

So I deleted all objects and appended all the objects in the chess scene, including the lights (1 sun and 1 hemi), and they rendered fine as well:

blender - good lighting
blender - good lighting1539×649 209 KB

(this one has 5 total lights, forgot to remove others I added, but they’re not being rendered)

I have no idea what I did that could have produced the render in the first image. I’ve been gradually tweaking my startup file, but with window placement and other UI stuff. I didn’t mess around with lighting options, and since I appended the lights into the new file as mentioned above they were identical.

What could I have changed that would cause this to happen? Or could that file just have become corrupted somehow? I did fix it by appending everything to a new file, but I’d prefer to know what I did so I can avoid it or quickly fix it.

#2

It looks like another face was created underneath the chess board. It doesn’t appear to be lighting related. How you checked the geometry?

#3

I went back and looked (I sorta gave up and am on lecture 106 now), and initially couldn’t find it. But it turns out you’re right. I had an older version of the chessboard as a backup, which was untextured (providing the white) which I thought was hidden, but I had only hidden the empty that was parent (of its board and surround). It was collapsed, and I saw the eye icon greyed out, so I was skimming over it when looking for what was wrong.

Probably clicked instead of ctrl-clicked when hiding it (though around then I was having ctrl-click occasionally fail to hide the group, which was weird). Silly mistake on my part, but hopefully I’ll get better at managing my stuff in the future.

Thanks~

#4

Glad I could help, I have made that same mistake so many times haha.

Merry Christmas!

#5

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