Re: [Algorithms] Dynamic lights with static shadows

[Gil G. <gg...@ma...>]

> Gil probably knows this stuff better than me since I haven't dorked with
it
> in a long time.  But, IIRC, in Q1, the surface cache (in software) or
> dynamic light map (special lightmap allocated for dlights) were modified
> directly via glTexSubImage2D.

This is how quake1 and quake2 worked.

> The "right" way to have done it back then was to render lightmaps into the
> framebuffer then do an additive pass, but this trashed multitexture
support
> (which is why we didn't do it that way).  I don't remember what was done
in
> Q3, although I believe John changed some stuff in the interim between my
> departure and before Q3 shipping.

Quake3 is done with a separate pass, which really is a more sensible way to
go.
-Gil