ZBrushCentral

Projection Master Alpha and Brush Issue

Hi All,

I have been having some problems with ZBrush 3.5r3 on my work computer. There are actually two problems, both to do with Projection Master.

  1. If I enter Projection Master and choose a tool, such as Smudge, then pickup. The next time I enter Projection Master and choose the Smudge brush, all of the settings are lost and the brush no longer functions the way it should. The current workaround I have is to choose the SimpleBrush before picking up, that way the Smudge Brush will still work.

  2. Sometimes after exiting Projection Master, my brush alphas have a slight square around them. They act like this in normal sculpting as well as PM. The only way I can get them to work properly is to restart Zbrush.

Any help would be appreciated!

Windows XP Professional
ATI Radeon 4800 HD

Here is a screen shot showing the alpha issue.

I don’t know what might have caused the alpha to change like that – maybe you’re using some kind of community-developed “helper” plugin?

It looks like your Alpha values are probably something like:


  • MidValue 50
  • Rf 2
  • Contrast 5
Try changing to the default values of


  • MidValue 0
  • Rf 0
  • Contrast 1
That should do the trick!

I have this issue as well, I enter projection master and use the directional brush with the a alpha circle. Then when I pick up from projection master and enter projection master again, the directional brush does not work anymore with any alpha. It only works once, thats it. Nothing else seemes to make it function again, no matter what work around you do, it does not respond again. I doubt anyone knows whats wrong with it. This is one of the main features of zbrush but a big disappointment.

Exactly the same problem than wolf57 for me.
I was wondering if Ram or system limitations could be the issue here.

A co-worker of mine just started running into the same issue with the directional brush, the only work around I could find was to drop the RGB intensity to any number under 100. I.e. if you drop it 99, the alpha works again.

Hope that helps.