I'm trying to texturize the hairs of the 3D character using the projection painting tecnique. At the beginning the hairs are separated objects from the body. Then I spread the texture taken from a picture over their surface and finally I attach them to the rest of the body and I save the file.
But,when I reopen Blender (2.8),the base color is applied,but not the image that I want. I tried to join the objects in two ways. Before I have selected the hairs and then the body and I have joined them,but it didn't work. Then I tried to select before the body and then the hairs and I have joined them,but also in this case the image texture is not applied when I reopen the file. What's the solution here ? You can see what I did going here.