I’m theorizing with this as it should be possible but I have no idea how to set this up exactly off the top of my head.
Also im curious if in UE4 2 adjacent
materials can be created such that
they have different friction, this
would be usefull in driving games, eg
grass next to tarmac.
This is possible. This would be a Physical Material. In your material for your Tarmac or your Grass you would assign this in the material itself. There are settings in your Physical Material that you can setup things like Friction.
Here is the documentation for that.
Is it possible in UE4 to set up
materials such that spin will generate
curve. (or must this be handled in
code or blueprint)
Blueprints or C++ would be a good place to start with this. In BP I would look into things like adding impulses or forces when specific events happen. This would possibly be a good place to start with to fake the effect you want. Just thinking off the top of my head this is where I would look first. There are some users on the forums (Click here for search results via Docs.Unrealengine.com and switch the Forums Tab) that have been doing some good things with the ball template and their own rolling ball games. Maybe they will have tips or you will see if they have done something similar to what you’re trying to achieve with the curve.
Tim