within my short time i have already hit a wall. During this tutorial (link bellow) I'm doing fine until i have to use the paint tool (around 30mins in). When i try to paint nothing happens but when i click the paint attribute on the selection part on the bottom right the whole 3d model goes yellow.

http://www.sidefx.com/index.php?option=com_content&task=view&id=2168&Itemid=361 [sidefx.com]

Thanks, Bradley