PSX: Ripping and Transparency

[TLaurus]

Hello,

I've been using PSX-VRAM Viewer to experiment with tile ripping, but I've run into an issue I can't find information on.

If a game's tiles use RGB black in the tile interior, and the background color in PSX-VRAM is also black, is there any way to figure out what the original transparency was? 

So far I've managed to get by with tabbing between active emulation and screen shots to manually figure out some transparencies, but I'm down to an opaque overlay I have no ability to reference in-game.

Any good work around?

Thanks!