No, that was a no-brainer, of course anything large getting reduced will result in a soft blob without detail.
AS 9.5 MacPro Quadcore 3GHz 16GB OS 10.6.8 Quicktime 7.6.6
AS 11 MacPro 12core 3GHz 32GB OS 10.11 Quicktime 10.7.3
Moho 13.5 iMac Quadcore 2,9GHz 16GB OS 10.15
Moho 14.1 Mac Mini M2 Pro OS 13.7.6
I was able to resize a copy of my pencil brush in another app and get the effect I was looking for.
Weird issue though. The tree branch come off the tree but when rendered, it comes off the side of the tree. See above image compared to this one below.