Ok, so I've been playing constantly and I think thre is DEFINETLY a raycasting bug in AGK.....unless there's a fundamental issue.
Specifically, on the X axis, and when casting against an object that has a very low angle of difference to the cast.
The attached video shows this perfectly....when I rotate around the Y axis, no issues what so ever. When I rotate the X axis to make the raycast go down (it's casting from object position to camera position, then placing the camera at the intersection point) it goes crazy when the angle is too steep/small. The number on the screen is the object number it is colliding with - you can see this jumps between 0 and the object every other frame.
This is the exact same problem I had with the vehicle physics, as it kept "missing" the ground when casting downwards....again, only every other frame. It's really odd....but I;ve had ZERO issues with it in any direction other than when the raycast is moving upward along an object.
Note the building is just a simple cube.
Paul, this is making 3D collision a nightmare to get fully working - can you PLEASE have a look? I suspect it's also the reason behind some of the physics tunneling.