There is a third party tool that does this -
https://fillpattern.com/#
You can create a series of objects that will imitate a fill pattern using Discover>Map Making>Apply See Thru Shading or MODIFY>Edit>Custom Patterns.
You can add custom bitmaps into the C:\Users\USERNAME\AppData\Roaming\Encom\Common\Fill_Patterns- these will then appear within the Legend (Colour Pattern) Editor.
However they will not appear when applied to a 2D cross section. They will only work in the Discover3D or PA windows.
You can create a series of objects that will imitate a fill pattern using Discover>Map Making>Apply See Thru Shading or MODIFY>Edit>Custom Patterns.
You can add custom bitmaps into the C:\Users\USERNAME\AppData\Roaming\Encom\Common\Fill_Patterns- these will then appear within the Legend (Colour Pattern) Editor.
However they will not appear when applied to a 2D cross section. They will only work in the Discover3D or PA windows.