Pixologic's free modeling tool Sculptris was one of our recommended apps for creating on the Surface Pro, with its minimal interface and large touch targets.
Unfortunately, the latest system updates and/or the recently released Wacom driver update seem to have rendered the software inoperable here.
We've tried uninstalling and reinstalling it, but the software just won't load. There are no reports of trouble on the Pixologic forums, but that doesn't surprise us given the small number of Surface Pros in the wild.
Please test the software on your Surface Pro here and leave a comment if you see the same results.
UPDATE: Sculptris is back with the updated Intel HD4000 driver. Read this post for details.