@cowcat...

SM64 visual difference.. i dont see any difference lol but shaders working..., (i can publish this bin with sdl2.library beta to test)

Make another SDL2 lib width new tinygl support... not sur, because :
1. new TinyGL.. is beta... and not finished
2. SDL2 can use shaders with opengl renderer but same as SM64, i dont see any difference (speed.. benefits etc...), i think FBOs support when available is more important with SDL2 (SDL_RENDERER_TARGETTEXTURE support for example)
3. I could only compile PrBoomPlus with shaders support, SM64...
ScummVM: i need to retry because it's more complex and not working with my last test.