Doc:2.6/Manual/Textures/Types/Volume/Voxel Data

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Voxel Data

Voxel Data texture

Voxel data renders a voxel source, working very similarly to an image texture, but in 3d. Various input data source types are available (such as smoke voxel data, or external files), as well as various interpolation methods.

The voxels are stored in a flat z/y/x grid of floats. Functions for sampling this based on location within the (0,1) bounds are available in:

• source/blender/blenlib/intern/voxel.c

The default voxel data source, Smoke, is used for rendering Blender's internal smoke simulations. Other sources include binary raw formats, and Image Sequence, which can be used to stack a sequence of images into a 3D representation, which is a common format for medical volume data such as CT scans.

Settings

File Format

Blender Voxel

Default binary voxel file format.

8 bit RAW

8 bit grayscale binary data.

Image Sequence

Generate voxels from a sequence of image slices.

Smoke

Render voxels from a Blender smoke simulation.

Source Path

The external source data file to use for 8 bit Raw data and Blender Voxel formats

Domain Object (Smoke)

Object used as the smoke simulation domain

Source

Smoke

Use smoke density and color as texture data.

Flame

Use flame temperature as texture data.

Heat

Use smoke heat as texture data. Values from -2.0 to 2.0 are used.

Velocity

Use smoke velocity as texture data.

Resolution

Resolution of the voxel grid when using 8 bit Raw data.

Interpolation

Nearest Neighbor

No interpolation, fast but blocky and low quality.

Linear

Good smoothness and speed.

Quadratic

Mid-range quality and speed.

Cubic Catmull-Rom

Smoothed high quality interpolation, but slower.

Extension

Extend

Extend by repeating edge pixels of the image.

Clip

Clip to image size and set exterior pixels as transparent.

Repeat

Cause the image to repeat horizontally and vertically.

Intensity

Multiplier for intensity values