@steve02081504 In the past, we had an idea in another environment called CROW to add a DLL that would apply a filter to the shell rendering results.
It would be a DLL that would input and output bitmaps with transparency.
Unfortunately, the specifications for this have been lost, but if you are interested, I would like you to come up with some appropriate specifications.
If the specifications also pass the current surface number and animation number, it could serve as a starting point for realizing a specification that completely overrides the rendering results of SSP.