Bright Flash Frames and Lighting

[NeuralStunner]

When fullbright Flash sprites are displayed, the rest of the weapon is lit up (to about halfway between room light and fully bright).

While it seems like an intentional behavior, I'm annoyed that there's no way to override it. Worse, all the brightmaps I made to handle weapon lighting are made basically pointless.

[Graf Zahl]

This was done to tone down some of the bad effects of the original weapons. The chaingun's flash sprite in particular looks like utter crap if this isn't done.

[NeuralStunner]

I understand why. But here's a case where it's unwanted (I can't even see my brightmaps in effect) and non-optional. Is there a way to detect whether a sprite has a brightmap, and disable the lighting effect?