Robert Rehammar wrote:
> 
> However when rendering this I get white dots of the boundary of the
> sphere_sweep in the transparent block. Anyone have any ideas of how I
> solve this?

This could be a coincident surfaces problem, as most little white (or 
black) dots are. Are the two surfaces overlapping each other exactly? If 
so, move one of the objects slightly and the dots should disappear.

Raytracers can never decide which object to render if both surfaces are 
fighting for the same rays.

I hope this solves the problem.

Sam

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