In Projection Painting Mode, a screen texture covers the whole viewport, and the user paints this screen texture. When finished, the user can apply this screen texture to the current layer, or clear the screen to start again.
Screen Texture painted before applying textures to the current layers.
Ptex texture after the screen has been projected.
Ptex texture rendered in 3ds Max.
Pros
Cons
Previous: 3D Painting
Next: Brush