Why can't I see what I painted with polybrush?

The material on my plane has the correct shader - standard vertex color. When I paint, it says I can “Undo paint brush” under edit, so I think it is painting, but I can’t see it. I’m not sure if it has to do with lighting or something else. Thanks for the help

Hi, I got the same problem too, did you find the answer?,Hi, I got the same problem, did you find the answer finally?

same. this seems completely broken with no solution to be found anywhere. Nice job devs.