Ok it’s not really a Zbrush problem so I didn’t want to start a thread in the troubleshooting forum. I was wondering if anybody else is having problems with Win7 not letting you enter numeric values into slider inputs. I tried to enter an exact number into the decimation master sliders and many others just for the sake of it and I can’t. Same happened to me in XSI so I figure it’s a Win7 issue.
I’ve looked everywhere for the mention of it but couldn’t find anything. Anybody experienced this before? Or maybe you’ve found a way out? 
