Volume Renderer
Renders particles as a density volume.
Volume Renderer
Method #
This node renders particles using a volume renderer. This causes space to be split into a 3D grid of cells and particles within each cell are accumulated together, before the cells are rendered to screen in depth order. This can give the appearance of a more continuous, solid, smooth result than would be achieved by rendering particles as points. One of the advantages of volume rendering is that lighting and shadow effects can be rendered realistically, with light cast through the grid being absorbed and tinted by filled cells to create transparent shadow effects.
The Resolution parameter controls the resolution of the 3D grid, where higher resolution will give more detail but impact more heavily on performance. The area of space covered by the grid can be controlled by connecting a Bounding Box to the Bounding Box input.
This effect is computationally demanding and may not be suitable for some real-time use cases or hardware targets.
Parameters
These properties control the core behaviours of the node.
Parameter Details
Resolution The resolution of the 3D grid used for volume rendering.
Colour The tint colour applied to the results of the volume render.
Particle Size Edit the size of the particles once they are rendered.
Particle Alpha Change the alpha value for the particles.
Shadow Alpha Change the alpha of the shadow that is cast by the particles.
Absorption Colour The tint applied to light as it passes through cells and is absorbed.
Rotation Randomness ERROR: Variable not found: {att-node-particles-rotation-randomness-description}
Luminance Randomness Control how much randomness is in the luminance of the rendered particles.
Motion Blur Amount Control the amount of motion blur.
Voxel Size Control the size of the voxels.
Cast Shadows Control whether shadows are cast.
Fog Near Distance The distance at which the fog effect begins to be applied.
Fog Range The distance at which the fog effect reaches full intensity.
Fog Colour The colour of the fog effect.
Inputs
These properties control the core behaviours of the node.
| Parameter | Details |
|---|---|
| Resolution | The resolution of the 3D grid used for volume rendering. |
| Colour | The tint colour applied to the results of the volume render. |
| Particle Size | Edit the size of the particles once they are rendered. |
| Particle Alpha | Change the alpha value for the particles. |
| Shadow Alpha | Change the alpha of the shadow that is cast by the particles. |
| Absorption Colour | The tint applied to light as it passes through cells and is absorbed. |
| Rotation Randomness | ERROR: Variable not found: {att-node-particles-rotation-randomness-description} |
| Luminance Randomness | Control how much randomness is in the luminance of the rendered particles. |
| Motion Blur Amount | Control the amount of motion blur. |
| Voxel Size | Control the size of the voxels. |
| Cast Shadows | Control whether shadows are cast. |
| Fog Near Distance | The distance at which the fog effect begins to be applied. |
| Fog Range | The distance at which the fog effect reaches full intensity. |
| Fog Colour | The colour of the fog effect. |
| Name | Description | Typical Input |
|---|---|---|
| Bounding Box | The region of space included in the volume renderer. | Bounding Box |
| Light Node | Lights which affect the volume renderer. | Light |
| Rendered Emitters | Specify which emitters are rendered using this renderer. By default, all emitters connected to the same particle root as the renderer are rendered. | Primitive Emitter |
| Transform Modifiers | Apply the transforms of another node to this node. | Null |
| Target Node | Modifiy the rotations of the node to always direct the z axis towards the input. | Null |
| Local Transform Override | Apply the transforms of another node to this node, relative to its parent. | Null |