Hi fhoofman,

The same thing will happen with both the full size version and the mini version (only the interface has been changed)

For now, one way to overcome the white spots or speckles is to add a Sky texture: to your scene (any will do!) then make sure you click the 'Add sunlight' ('Sunlight' on the mini version) to make sure your render doesn't look too dark.

Because of how things are setup within the plugin, adding a sky texture, should also provide a slightly faster render.

I guess the uber shader (Silk setting) requires further tweaking, I think I know what's causing the problem.

Thank you for your feedback!

db4tech