How does one render an image in prman where only the moving channels (diffuse, ambient etc.) are blurred, but not the refraction from a static object?
Dan Maas
Unfortunately it is not possible to "undo" the blurring of shaded micropolygons without turning off motion blur altogether. You could try increasing the number of motion samples to prman's maximum (6), since each sample is shaded separately. This will reduce the blur at the cost of longer render time. For a more complete solution you may have to render the refraction in a separate pass, or use 2D vector motion blur.
