Did you mean vertex painting or using vertex groups to get different colours on a 3dprint? I have a lot of these shorter videos planned. All based on things I didn't understand when I started out :) Thanks for the feedback!
What could be the cause when the selection in vertex group does not work? This is a humanoid model with a weight and a rig. Sometimes it works, sometimes it doesn't.
I experienced this kind of thing a lot when I first started using vertex groups and in my case it always ended up being because I had forgotten to assign a selection or I had accidentally removed a selection. Pressing the remove button can give you unintended results too because if you hit the remove button, it is easy to think you are removing the contents of the vertex group but you aren't. You are removing any vertices that are currently selected on you model from the vertex group. I am not saying it is as simple as this but vertex groups are important in Blender and they do work and are well tested so random behaviour would be very surprising. That said, it is interesting you specify you have added weights because weights applied to bones are actually vertex groups and it could be a bit confusing if you have already created vertex groups with the bone names.
Great tutorial. I had no idea about this and now I suddenly do. 😀If only every tutorial was like this I would actually get somewhere in Blender... Thanks mucho!
