OK, here we go. Let's start with something simple, a ball and a box. We're going to make the ball glow and the box will catch the glow. 1) Start a new empty scene and create a ball prop and a box prop. Put the ball on top of the box. 2) The ball will be the light emitter. Set its ambient color to something else than black, and the ambient value to 1. 3) The box will be the light receiver. Connect a Gather node to its ambient color channel, make sure that Max Distance is large enough (from each point on the box a ray should reach past the ball), set the ambient value to 1. 4) Delete all lights. Enable raytracing and render. Hope this helps, Steven.

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