The IDLitVisualization::Set3D procedure method sets a flag indicating this visualization is three-dimensional.
Obj->[IDLitVisualization::]Set3D, Is3D [, /ALWAYS] [, /AUTO_COMPUTE]
A non-zero value indicates that the visualization is three-dimensional; 0 indicates that it is two-dimensional.
Set this keyword to indicate that the given 3-D setting always applies.
Set this keyword to indicate that the 3-D setting for this visualization should be auto-computed based upon the dimensionality of its contents. This keyword is mutually exclusive of the ALWAYS keyword, and the Is3D argument is ignored if AUTO_COMPUTE is set.