Ive run into this problem a ton of times, without actually being able to clarify why my pen started acting weird. Its something my computer does, as it works fine when I switch tablets. Im hoping its a hotkey in Z brush I was unaware of.
Basically I just want to use a normal brush without it changing pressure/Z intensity/Draw size or whatever it is that it seems to be doing. How do I change this setting back to normal? If I restart Zbrush itll pop up within 10 minutes, so I need to know which setting it is that keeps getting activated.
As you can see in the cube, I just draw ONE line down, and it changes (quite unvoluntarily from my part), and switches variables in EVERY stroke.
This has actually bugged me for YEARS. I hope youre able to help me out!
Thank you in advance!
Attachments

Using a normal mouse it makes a regular stroke.