Originally Posted by tylercoon

Well, if you right click Toribash, then Properties, you can c/p a texture by going to customs folder then finding your name. Copy/paste the texture in your active inventory then there you go.
I haven't tried this, but if it doesn't work, then open Paint or a program that lets you save pictures.

Originally Posted by Slycooper

There's no outright tutorial on it, but it's a skill you'll pick with gimp or PS or what have you about taking elements from other images, cutting them out and putting them in your image, and distorting or painting over them to map onto your texture. Some HD transformers sets you see around were made from images of trucks or motorcyles, things like exhaust pipes or tire rims were cut out and pasted onto a hit and distorted to be eyes or details around a face or legs.

Just learn how to scale/distort images, and learn proper texture mapping.

http://forum.toribash.com/showthread.php?t=158676
http://forum.toribash.com/showthread.php?t=241808
http://forum.toribash.com/showthread.php?t=157854
http://forum.toribash.com/showthread.php?t=396812