Hi,
I render my reflected scene to a texture then I apply this texture on a mirror plane. Since the whole scene is rendered to a multisampled FBO, I also render the reflected scene to a multisampled renderbuffer (only 4XAA therefore this is another FBO not the one used for the final result) then use glBlitFramebufferEXT to resolve it to a texture.
My question is: would it be preferable (in terms of speed) if I rendered the reflected scene directly to a higher resolution texture but without antialiasing? I guess the quality should be similar, but I don’t know which one would be faster, 4XAA + a Blit compared to no AA but render to texture four times the ‘normal’ size.
Please note: I am using GL 2.1, as far as I know, I can’t use multisampled textures.
Thanks.