A few months ago I took a weekly class in the animated program CelAction. I learned a lot from this. In the class we were thought how to create a character, add rigs to it and the principals of animation in in the program as well as having character interact with props. At first we used pre made characters built into the program but we were able to put together our own character in the last few weeks.
My character is park ranger hedgehog called Henrietta, before this I had only sketched her in pencil so creating a lineless version in Photoshop was something very different.
CelAction was an interesting program to work with, at first it looks very imposing and difficult to manage but once I understood it and got to work on some real animation I found it worked really well.
Recently I completed a course learning 2D and 3D Auto CAD, It was very interesting and I learned a lot I had never heard of this program before.
These are screenshots I took show some of my process when when creating a 3D Model,
Watering can from an exercise.
Half of a 2 part tool used to secure large glass walls and doors
referenced from real life as part of a work experience project.
Working in CAD is different to any other graphics program I've used before, I think modeling in, 3DS Max or Maya feel a bit like clay they way you push and pull on various parts and smooth them out but CAD is a bit like carving shapes into stone. I usually cut into the shape more than mold it.