Mercenaries Engineering added a wide range of improvements to Guerilla. Check it out!

Guerilla is a tool suite for such production steps as lighting, look development, and rendering. With the 2.2 version, Mercenaries Engineering has added a bunch of new features to the suite that will enhance and simplify your workflow in such areas as shading, color management, output, geometry, and textures.

• For instance for shading, the Hair2" brute force hair/fur shader, Parametric Bokeh shape, Experimental support of looks, Improved sampling noise quality were added. 
• The lighting is empowered by General Light Color, Intensity, and Exponent per RenderPass, simple light shader, without clipping information, that allows for altering the final look of any light. 
• API and Procedurals were also taken into account and now includes API for shading operators, API for bsdfs, using Intel ispc, RibGen SDK class documentation, to name a few. 

Visit the official Guerilla website to get more details on the update.