Hi a question about the 3d web thingy.

How free is creating 3d web in blender is? For example, if i go freelance and i make a 3d web page following the basics of the blender tutorials and sell it do i owe anyone or have to pay fees for any related porgram used along the blender publisher? If so how much?

Ok, not that im going into freelance or anything(so dont contact me for doing webpages, lol), it just a curiosity that has popped up. Thanks in advance.