Lighting profiles completeness checklist

There's a lot of things I have intended for some time to move into lighting profiles. In the interest of keeping these from being forgotten, I'll list them out here.

- [ ] Brightpass threshold and possibly other related options there
- [ ] Envmap lighting multiplier(would be new shader feature)
- [ ] lighting.sdr SPEC_FACTOR_NO_SPEC_MAP
- [ ] lighting.sdr GLOW_MAP_INTENSITY
- [ ] lighting.sdr GLOW_MAP_SRGB_MULTIPLIER
- [ ] shield-impact-f.sdr EMISSIVE_GAIN
- [ ] bloom configuration, with user config slider multiplying bloom strength.

I also want to add at least one further designer tool for them

- [ ] Profile switching in-mission with transition time, for smooth interpolation between float values.
- [ ] purely dynamic runtime profile adjustment options, possibly just in Lua so people can make the sexps they actually need for this.
- [ ] Controls for renderTechModel() or renderOverheadModel(). Most likely form off the top of the head is a ltp section for named light arrangements, setting defaults used in certain contexts, and some controls for switching them around at runtime.