Thank you for your reply, isometric8.
I upped my DPI and that did the trick. Now I just need dark mode, but no rush. I still have to purchase it!
With no shortage of pixel apps and being able to do more or less the same thing, I like your development and presentation the most. The isometric views in the marketing of Lightcube ,and the brush and shape tool really stand out to me. I feel it creates a sturdy foundation to start and build from. Being that it's difficult for me to learn, remember, etc. having things that lend this help, in such a way, while also drawing me in with the angles/patterns, is very pleasant.
I know you don't have enough reviews of Lighcube and you deserve more. Maybe in the future you can develop a voxel app. ;)