Hi,
Don't know if someone has encountered this problem, but there seems to be a problem either in Carrara or the Plugin.
When there are cracks in the render (see before smoothing), I go to the Vertex modeler and enable Smoothing for the model. It's updated in the Renderer. Then, I disable smoothing (= None) and the rendering is fine without any cracks (= after smoothing). (Please note that in both screenshots, there is not smoothing applied! The model was just smoothed and disabled afterwards.)
Any ideas why this happens?