Horde3D

When setting occlusion culling on a camera:

h3dSetNodeParami( node, H3DCamera::OccCullingI, true);

Then during play adding and removing a lot of nodes in each frame hangs
the engine at an uncertain point (full freeze). it happens in the render() function, I can't get
a decent stacktrace of this error. It seems to occur in the videodriver.

Hm, that's always difficult to debug. What kind of graphics card are you using and which driver version and platform? How many nodes adding/removing are we talking about? Does it also happen if you only set those nodes active/inactive instead of adding/removing it?