Added disk mesh, billboard object
Shader variables renamed
A disk is drawn
Billboard trick works
Some success drawing a textured the sun
progress on the sun
by default disable textures 0-3
SSTextureWithAlpha
Minor rearrangement of variables
Allowing drawing a disk with no texture
Draft of the occlusion query code
A bit of work on getting the screen coordinates for the flare
Bit more work on the flare drawing code
Work in progress on getting the flare to draw in screen coordinates
Success converting from world to screen coordinates
Matching sun's dimmensions onscreen when drawing sprites
Working estimated fraction of the pixels shown for the sun
Individual sprite scaling
Good starting point for a working sun flare
Fixing GL state shenanigans