it seems like the texture filtering is not working behind a miaX material.
i made 3 exemples to explain the problem:
Render with no GlassWindow:
Render with Glass, shader miaX (glass is a cube, Mia preset GlassThick):
Render with Glass, shader Blinn:
As you can see, with no glass or with a blinn shader the filtering is working, with the MiaX all i get is this blur. the result mantains the same with diferents filters (Off,mipmap 1.0, mipmap 0.1, quadratic).
I also tried with a single polyface (no cube) glass window with the apropriates settings for the miaX (thin) but the results are also the same.
I tried a lot of others things but again with no luck,
if someone came across the same problem and found what going on, please let me know.