It takes a greyscale texture describing your desired surface, and warps the UVs to look like in the screenshots.
Yes! I just want to get it more polished and full featured before submitting to make sure I get in on the first try.
I tried with preview 1 and it didn’t work. It was complaining about the uses of clip() IIRC. I will definitely support the release version of 4.8 especially since 4.8 allows for new useful features like depth buffer manipulation.