Actually Yabause does that if you use its OpenGL graphics interface instead of the software interface. It interprets the mesh command as 50% transparency. I use

Actually Yabause does that if you use its OpenGL graphics interface instead of the software interface. It interprets the mesh command as 50% transparency. I used Yabause to grab the VDP2's layers when writing this, and at first I was a little stumped when the spotlights weren't meshes :)