The Jig system supports the rendering of volumetric effects such as smoke, clouds, and fire. Volumes may be defined using all the power of the Jig shading system, similar to the layering of maps and shaders. Volumes may also be defined by using large numbers of sub-pixel particles. Jig has the ability to cast shadows from the volumes onto other objects or even themselves (self-shadowing). Self-shadowing is crucial for many effects like smoke and clouds. The volume-rendering algorithm is also extremely efficient in terms of both memory and speed. Many effects that were previously impossible simply because of render time may now be achieved at nominal cost.

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