/vr/ - Retro Games

So... Maybe not entirely Doom related question, more like spriting and Photoshop question, but I have nowhere left to go - everyone else gives me retarded advices that give nowhere near desired result.

im trying to make a lightning effect in a PNG with transparency. Problem is all lightning generation tutorials I find are for creating lighning effect against black backdrop - here's a blue tint effect that does not work if overlayed over non-black background. I know that black BG can be removed IN photoshop with Screen type blending, but that only works against an image, not a transparent layer.

Im also aware that GZDoom has an additive overlay mode that does the same thing, but I want to further work with this texture outside of Doom and Photoshop, and I need proper transparency with it's Lighting effect. Most advices Ive heard have to do with cropping out image as is with /some/ transparency info, but that transparency is being backdropped, again, against black, and it becomes apparent if it is viewed against lighter colors - like red on the right of the image, while I want it to drop into proper, non-blackened transparency.