TerrainOps

I've made a few terrain editors over the years. Circa 2016 there was this thing, which isn't very impressive but it does the job - or a job, anyway - and in 2017 I made a new version which could do a bit more but still wasn't anything to write home about. I've wanted to give it another go for a while, and recently it was requested that I add some things, so this week I finally sat down and made so…