mackenzieh wrote:
..shapes like circles, triangles, or squares. Is there a plugin for 3D Shapes?
Hi mackenzieh,
You can simulate 3D objects by using various scripts, like the one Esper mentioned, to give a 3D look to your flat image. Some scripts use extrusion to get the 3D effect, while others use beveling and shadowing to give you a 3D effect. You may also have to do some manual editing to create the highlights and reflections you need for a more realistic effect.
Most of the scripts work from a selection or path, so you should take a look at the
this thread for help creating the shape, then using the various scripts at your disposal to create a 3D effect.
Don't forget about G'MIC.

Here are some relevant threads for you to look over..
viewtopic.php?f=8&t=2893viewtopic.php?f=9&t=3020Hope that helps!