CastRay and interiors...

#1 Except in a few odd cases (using collision entities) the visible geometry in an Interior *is* the collision geometry. It is kinda the point (and limits) of brush-based geometry. What exactly is the bad behavior you are getting?

#2 I'm working on an arcade-ish horse-racing game. It's more like a Mario Kart with horses instead of karts. The horses are a modified player class (creating them out from vehicles was too troublesome).

These horses can align themselves to the terrain or interior surface below them using a blended animation thread. It casts two rays, one for the horse's front and another for it's back hoofs. The height difference between the front and back is used to set the thread position.

We have a track with staircases. To make things less jumpy, we placed a simple collision hull over the stair steps, creating a slope. But since the raycast ignores the collision hull and goes after the visible brushes, the horse tries to align with the stairsteps, instead of using the slope.

I'm going to try to tweak the values I'm using the sample the points and interpoalte between the conform sequence positions to see if I can get a better result.

#3 Heh, that did the trick^^

Interpolating between te sequence positions at a fixed speed, instead of plain setting the new value solved the problem. Now the horse smoothly goes up and down the staircases, with a very subtle shaking. The raycasts agains tthe true interiors geometry now works on my favor.