What's wrong with the textures(already installed 10G sourcemedia)?

[City Builder]

I'm sorry, I didn't subscribe to this thread.

By action, for me all I need to do is to open the texture window again, and when I try to paint down a new texture, all the existing textures I already painted on the landscape come back and pop on the view again.

I'm sure you've already tried this so not sure what else to help you, or why it works for me but not you.