I did everything as described at Helix, but did not work for me.
Seemed to actually make the shadows worse :-(
To bad. The game is great and 3d would have been fantastic on this game.
Hi - I updated the installer a while back. Give it another try. This is an unfortunately complicated approach to making this game work in 3D, but's that community modding I guess. A couple of others had issues like you and the new installer approach worked for them.
NOTE - There is a video and screenshots here as well
SolutionGaming Divinity Dragon Commander .