LDCad 1.6 (win+linux)

[Kevin]

Any ideas?

Ether it can't load the primitives or they are using wrong winding.

The top of your dat states it uses Counter Clock Winding (CCW) so any polygon or primitive using Clock wise winding will be invisible when viewed from the outside.

MLCad's software rendering doesn't apply the culling so for that program winding doesn't matter. Modern hardware expects winding info though.

Alternative is to remove the CERTIFIED CCW line from the file, LDCad will do dual sided rendering (slower) for files without known winding.

The CCW was the problem.  I commented that out of each tile and got everything back.  I then went back and fixed the primitives and restored the CCW and everything was still there.  My guess is that I selected the wrong orientation when I exported the design from LDPatternCreator.

Thanks for the help!

Kevin