position error
Revert "position error"

This reverts commit 7329d6035129b7adb8e44c00949dd6ae64fa27a6.
Revert "fixed MoveLightRay return issue"

This reverts commit 52e47de888878772d14be540b2dbafcbc3f50efb.
Revert "Revert "position error""

This reverts commit a0b2cef2a5c791e5f9cda1afff7f322898e47a82.

Conflicts:
	drawingShells.nb