kaom, Depends on the plug-in, how complicated, how much code can I steal from other stuff I've done. Anything Grooves probably took months (though not full time, I have a day job). Apply Shader to Selected Items took two hours because I could steal most of the code from other things I've done. Some shaders have been a 15 minute job. I think nearly anyone who wants to do it, can do it. You probably aren't going to be building a new renderer right away, but shaders are pretty easy and a good place to start. Knowing C++, COM, and some general math is helpful and of course if you've got questions we're always happy to help. Regards, Eric Winemiller Digital Carvers Guild 3D plug-ins for Carrara http://digitalcarversguild.com

Eric Winemiller
Digital Carvers Guild
Carrara and LightWave plug-ins