Zbrush Brush Alpha Overlay blending (subtracting and adding at the same time)

JakBB

Hello I have a quick question about Zbrush.

Is it possible to subtract and add to the model at the same time while using a brush with a custom alpha?
What I want specifically is where the alpha is grey (value 0.5) it doesn't change the model, where the alpha is white (value 1.0) it adds to the model, where the alpha is black (value 0) it subtracts from the mesh.

If this feature doesn't exist (and I think it totally should, because it could be really really useful) is there any other sculpting software that has this feature included?

Thanks in advance

Burpee

You can't do the 0.5  value thing, but you can use an alpha in the selection tool, and then use this to subtract your mesh

JakBB

Ok I found a solution, in the Alpha settings I just had to activate Surface