This extension actually consists of 3 types of volumetrics:
- "Constant density" - creates a cube shaped volumetric area in your scene which has a constant density. This is useful for very large atmospheric haze effects for example.
- "Noise3D" - this also functions as the constant density type except it also adds an adjustable 3D noise to create density variations in the volume.
- "Particle based" - this lets you use a particle simulation to define the volumetric density. You can either use particles directly in supported applications (such as Maya, 3ds Mac, Cinema4D, Softimage), or load an external particle file in several formats (.abc, .bin, .pxy, .prt, .rpc).
Any Maxwell material can be applied to the volumetric object (or particles), but generally a normal lambert material works just fine.
Constant density
This will actually be a separate cube shaped object in your scene, which can be manipulated like any other object (translated, rotated, scaled). The volumetrics will be visible only inside this cube shape. Please see your plugin documentation, for specifics on how to add a Constant Density object to your scene.
An example mimicking heavy atmospheric haze using the Constant Density cube encompassing the scene, and the result renders with/without the volumetrics. Note that a very low density of 0.003 was used since the Constant Density area was so large in this case (1km).