Documentation for additional settings?

[Shrinks99]

The releases page mentions the following options can be added to boot.cfg:

BBB_OPT_ENABLED=7:0,
BBB_OPT_CDGO=7:0,
BBB_OPT_HSR_RAYS_PER_POINT=5:150,
BBB_OPT_HSR_POINTS_PER_TRI=5:150,
BBB_OPT_HSR=7:0,
BBB_OPT_AO_BAKING=7:0,
BBB_OPT_COLOR_VAR=3:0.05,
UI_SCALE=3:1.0,
MIN_ASPECT_RATIO=3:0.12,
MAX_ASPECT_RATIO=3:5.0

Some of these are fairly self explanatory like min and max aspect ratio... What do the rest of these do?

Additionally I assume 3 is float, 5 is int, and 7 is bool? Would be nice to document this somewhere in the readme too :)