Texture Paint Mode Paint on 3D Model I'm starting to learn texture paint mode and I have the hang of it for the most part.  But I'm getting inconsistent results.

Before I was able to paint directly on the model (I know it isn't really doing so and is actually painting on the UV image).

But now when I click on the model with any brush it doesn't paint at all, which isn't a huge deal but I'd like to know why it stopped working.  

It still works with the "Mask" brush, but none of the others will work.    

Any idea why this could be happening?
When texture painting, there is an option to restrict painting to faces that have been selected in edit mode.



If this is something you want to use, you need to go into edit mode and alter your selection to adjust the areas you can paint on.