This is one of the big problem with SR3d is indeed the generation of part images. I was never able to use built in mechanism (crash), always wondered how Sergio made the thumbnails.
When used Sr3d I generated images for special parts with inventory function of MPDcenter, after creation of a model containing all parts missing a thumbnail.
When used Sr3d I generated images for special parts with inventory function of MPDcenter, after creation of a model containing all parts missing a thumbnail.