REQUEST: AO and other maps improvements

[KirilStrezikozin]

This feature request is:

• not a duplicate
• implemented

Is your feature request related to a problem? Please describe.
Originally posted by @sangouzhi in #5 (comment):
Hopefully the ao baked results will be as good as the Marmoset Toolbag 4, although this is a bit tricky.

Describe the solution you'd like to be implemented

1. Integrate image dithering (article)
2. Affect by other objects property (Marmoset's bake tutorial for info

[KirilStrezikozin]

• Normal map: Add "Colorspace" EnumProperty to choose between default and linear. Investigate how nm and decal nm output color look.

[KirilStrezikozin]

• Displacement map: ability to control midlevel, strength (scale) (probably these could be achieved through compositor); and base subdiv level (have like to intprops for base & subdivisions)

[KirilStrezikozin]

• Sideway needtofix: channel packing through compositor - see if original nodes are being restored rightly (compare to denoise and cm, maybe rewrite and extract some code chunks into separate methods)

[KirilStrezikozin]

• add Brightness/Contrast control to cavity map (or curvature I don't remember)

[KirilStrezikozin]

• bring image bit depth control to file formats like .png, .jpeg maybe... It'll be likely to require rewriting map saving with "save_as" OT and somehow control ImageSettings on the popup window (send context?)

[KirilStrezikozin]

• review possibility of baking complex material logic (node groups, strange nodes)

[KirilStrezikozin]

• Normal map from object materials has wrong colors if just plugging normal input into emission, rework: remove preview, run default Cycles Normal bake but exclude highpolies effect.