Volume Boolean Process
Volume Boolean process remove some region of data. Value within the removed region is set to be 0.
Note that removed region is just set to be 0 valued, and not necessarily hidden from view, (it depend on the alpha of attached color curve).
If you want not to convert the value in some region to 0, but to hide some region, use Volume Mask or Trimming modifier.
Boolean Type
Shaphe of boolean object can be selected from box, sphere and object.
With object type boolean, you can clip the volume according to the shape of other mesh object.
In this figure, the volume data is clipped within the head mesh object with shape of monkey. The shape of mesh object to use for boolean must be closed.
Intersect operation set the value to 0 outside of the region, while difference operation set value to 0 within the region.
Add operation cancel the boolean effect in process stacks.
[X,Y,Z] min/max
These 6 parameters determine a box shaped region for boolean.
Radius
Radius for spherical shaped region for boolean.
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