Once you have created a 3D model and defined one or more snapshots, you can render the 3D model to image and convert it to icon.
Converting snapshots to images is easy. Simply click the Operation->Edit snapshot as raster image in main menu or in toolbar and a new window with a raster image opens. The Operation menu contains two additional commands for conversion to icons:
This command contains the following sequence of operations and transformations:
If multiple snapshots are defined, it is possible to convert them to a layered image and then user the remove border operation on all layers. Finally, layers can be merged or converted to icons individually and merged afterward. The snapshots are effectively layers.
Note that the slight shadow enhancing the edges of the final icon is present around the blue check-mark.
When using the Make layered icon function, shadows are applied to each layer(snapshot), separating them visually - use this to your advantage. The function for removing empty borders works with multiple layers as well. The icon above was created from a Rendered image document with two snapshots literally with one click.