Normals are see-through

[whitequark]

This is some very weird bug, probably related to depth buffer? Draw a torus (
torus.zip. You can see the normal from the circle that's used to make the torus from this angle:

... but not from a slightly different one:

@Evil-Spirit please look into this

[Evil-Spirit]

@whitequark, yes, we have it everywhere. probably this is because tricks with depth buffer in ssglDepthRange

[whitequark]

@Evil-Spirit I'm not sure. This is not a problem in version 2.0, 2.1 or 2.2, but it is a problem with 3.0 with OpenGL 1 and OpenGL 2. It was introduced somehow during the Canvas changes I think.

[whitequark]

But 2.0 still uses the ssglDepthRange hacks.

[whitequark]

@Evil-Spirit Also, this only seems to happen to normals, and not to edges...

[Evil-Spirit]

fixed in Evil-Spirit/solvespace@832a8bd

[Evil-Spirit]

@whitequark, this happen because AlignToPixelGrid uses this function.

[whitequark]

Merged, thanks