What are the exact meanings of the core.ini file [HACKS] section?

[iNsane]

Long time no see!
As the title says, have there been some smart people around that tried to figure out what exactly the available options in the core.ini [HACKS] section are?

Code Select Expand

[HACKS]
ColorMipMaps = 0
NoPBuffer = 0
NoRenderToTexture = 1
NoPBO = 0
NoFBO = 0
NoHDR = 1
MapVB = 0

I did try some stuff, as in ColorMipMaps doing some wonky stuff to the diffuse texxtures. NoHDR sounds like disabling HDR when set to 1. PBO could be OpenGL's Pixel-Buffer-Object after googling for PBO and FBO being Frame-Buffer-Object.
But what exactly do these options do? Such as MapVB?
One combination also made my shadows go all crazy, lol.

But what exactly will NoRenderToTexture = 1 do?

I mean I could also figure it out on my own and write it down, but maybe someone else did it already? I couldn't find anything on the forum so sorry if this is a duplicate post.

[Guigafumi]

Posting to help bump this ahead of the hundreds of spambot posts.