Mantra: Image3D Procedural shader

Generates an iso-surface from a 3D texture image (.i3d) file.

If you don’t specify a bounding box for the procedural, the bounding box of the texture map will be use.

Parameters

Main

I3D File	Specifies the file to render.
Density Channel	The name of the density channel.
Density Threshold	The density threshold at which to generate the iso-surface.
Level Of Detail	Specifies an alternate level of detail for the polygonization of the texture.
Filter	The filter to be used in evaluation of the texture.
Filter Width	The width of the filter.

IFD Bounds

Bounding Box	The bounding box controls let you specify a bounding box for the referenced geometry. Only when this bounding box is “on screen” will mantra load the referenced geometry. You can set Bounding box to No bounding box required, in which case mantra will always load the references geometry regardless. You can also specify the bounding box by referencing the SOP’s bounding box in the SOP Bounds parameter.
SOP Bounds	The geometry whose bounding box you want to reference.
Min Bounds	The minimum bounding box dimensions, when setting explicit bounds.
Max Bounds	The maximum bounding box dimensions, when setting explicit bounds.

For more information on .i3d files, see the Image3d Files help page.

Usages in other examples

Example name	Example for