Rework on env. variable KISYS3DMOD. Until now, was used in different files using different ways, so no consistency between files.
code cleanup.
Rework on env. variable KISYS3DMOD. Until now, was used in different files using different ways, so no consistency between files.
Fix also an incorrect default 3d path read from KISYS3DMOD, when the path was defined without trailing directory separator.
code cleanup.