so I'm rendering this kithcen scen under 3.5 when i notice strange errors in the ray traced shadows on my blinds. The rendered fine under 3.1 but, wouldnt you know it, under 3.5 they look like a black and white pointilist nightmare. Whats going on; anybody know? this is only happening on the blinds. they are rounded and have a diffuse level of 80%. other than that, they're normal.