BRL-CAD is a 3D modeling systems where one is very often rendering high-quality visualizations of geometry.  We need good application icons to indicate most of those transformations.

One icon will represent ray trace rendering.  The other will be a cancel raytrace icon.

Define a set of at least 2 icons that we can use in our main GUI application (e.g., on a top toolbar). Submit the icons in a raw editable format (e.g., SVG, AI, PSD, or XCF) as well as an overview of them all in PNG format.

The icons should be scalable at least from 16x16 through 128x128 while maintaining a clean appearance.