Thanks again for access to this brilliant perspective course. There are so many creative folk on this course. I've been practicing to draw Freehand, some simple items as instructed in an earlier topic. First in 45 degree view and then repositioned (imagined), as you explained. I'd like to better understand how to think this imagined view through manually first. Are there more lessons coming with this thought in mind before using such a tool? The Zolly app looks amazing Marshall. Are you saying Zolly's an essential tool to continuing in your course moving forward?