Hi,

    It is possible to create a mask from a shape?. For example from the result of  "shape icosahedron".

    If the command does not exist I guess I may create it as follows

* the input would be the 3D map to be masked and the shape to be used as mask

* request all the (varray, tarray) from the shape.

* from varray,tarray build the  triangles that define the surface of the shape

* for each triangle create the normal vector

* multiply each normal vector by the position of each voxel (dot product)

* keep those voxels that have negative dot products for all the triangles.

  thanks for the help