This page provides an overview of the atmospheric effects available in V-Ray for Houdini.
Overview
The atmospheric effects in V-Ray simulate fog and participating media for a number of image effects. These effects also include V-RayToon, a cartoon-styled non-photorealistic effect that enables toon shading as a render effect throughout the scene, and Volumetric Grid rendering that works with grid based cache formats to create effects such as dynamic plumes of smoke.
UI path:
||mat Network|| > V-Ray > Effect
||out Network|| > V-Ray Render Elements node > V-Ray > Effect
||mat Network|| > V-Ray > Volumes
Atmospheric Effects
True atmospheric effects are applied throughout the entire scene as viewed from the viewport. While parameters give limited control over the appearance of the effect, atmospheric effects render faster than volumetric effects.
V-Ray Fog Effect
A fog effect throughout the scene, with control through maps and distance settings. See the V-Ray Fog Effect page.
V-Ray Toon Effect
A very simple atmospheric plugin that produces cartoon-style outlines on specific objects in the scene. See the V-Ray Toon Effect page
Aerial Perspective
An atmospheric effect that simulates aerial perspective. It works together with VRaySun and VRaySky to calculate an approximation to the aerial perspective effect. See the Effects Tab page.
Volumetric Effects
Volumetric effects use a volume to contain the atmospheric effect. While volumetric effects offer a great deal of control over the placement of the effect, they take longer to render.
V-Ray VolumetricGrid Shader
Imports grid-based volumetric simulation data from external programs to create fire, smoke, and fluid simulations within V-Ray for Houdini. See the V-Ray VolumetricGrid Shader page.
V-Ray VolumetricGrid Texture
A texture used for sampling voxel values from a volume within V-Ray for Houdini. See the V-Ray VolumetricGrid Texture page.
Sphere Fade
A volumetric gizmo used to render just a small part of the scene by putting them in a special spherical locator. See the Effects Tab page.