Hi All,

Using point instanced geometry , with motion blur turned on I am getting near black pixels randomly placed over the smeared area of the geometry int eh render. These are not NANs . Has anyone got any ideas as to what is causes the effect. I am using H12.0.754

Just using a directional light set to ray traced shadows gives me the effect. My first port of call was the ray tracing bias value on the mantra rop > adjusting it made no difference to the creation of the random near black pixels.

Rob