October 31, 2011, 03:56:10 pm
Lumion uses cubemap reflections. It's a 360 degree panorama texture rendered from the camera position, and this texture is projected onto all reflective materials.
This reflection technique is a heavily optimised way of doing reflections in real-time 3D graphics, and they will never give you the perfect raytraced reflections that you are expecting to see on the wall. If you wanted this, each frame would take significantly longer to render.