Ah, thanks - it was a bit getting my head around the various values and what exactly they do. most values seem to make the doom hand (melee) shine up like crazy, while leaving little light bloom elsewhere - so I guess I might have to adjust it with a new hand sprite to overcome this

I ended up with gl_exposure_base 0.7 _min 0.7 _scale 0 _speed 1 for now - not sure what the speed does except slow down changes made - as I didnt notice any change from moving from dark to bright rooms which I expected maybe it would do. is there a description somewhere?

(ps - yes the new version saves and remembers all 4 new variables)