Fall in love with blender for scentific plotting recently and happen to be a guy fancinate about both ray-tracing and cool visualization.

Some of the following images may come from my paper.

Image	Source
	The original one looks better and its hand-drawn (I guess).
	From Hardware-Accelerated Ray Tracing for Discrete and Continuous Collision Detection on GPUs
	A point cloud with color based on an external vector.