Irrlicht Engine

When I set Node.Visible = false, its collision doesn't work and its children's position are no longer updated. This is very wrong. How can I make node invisible only to my eyes ?

Several hours of debugging to find out that this does not work: Driver.GPUProgrammingServices.OnSetConstants += new GPUProgrammingServices.SetConstantsHandler(DoShaderThing); but this does: GPUProgrammingServices gpu = Driver.GPUProgrammingServices; gpu.OnSetConstants += new GPUProgrammingServices.S...

I managed to go around this.
First, in blender when i export x mesh i have to uncheck "Rotate X 90 deg" and rotate mesh in my application instead.
Also, i have to select right-handed coordinate system which seems to be set in irrlicht by default.

I've created ray from cursor to check the collision with the ground but the result of getSceneNodeAndCollisionPointFromRay is rotated -90 deg along x axis to what is drawn.
The node is loaded from x file. Exactly the same 3ds file works fine.