Texture Painting

From ZBrush Info

In ZBrush you can texture paint in 2 ways:

Projection Master uses a projection-based texturing system. The user 'drops' their model to the canvas, paints, then 'picks it up' from the canvas.

The concept behind Projection Master is simple. While working with a 3D model (usually a very high-resolution one–the more "standard" 3D tools are usually used when sculpting low- and medium-resolution details), you activate Projection Master to convert the visible portion of your model into pixols on the canvas. This simply samples the depth of your model at each visible point on the screen, and adjusts each corresponding pixol to reflect the depth, color, material, etc., of the model at that point. The model is then temporarily removed from the canvas, leaving you to work with the pixol-based representation of the model. This process is referred to as dropping the model to the screen.

PolyPainting works directly on the surface of the model without UVs.

Polypainting offers significant advantages compared to standard workflow:

• The resolution of the texture map need not be decided in advance. This is particularly valuable if you find you need more detailing on an area than you thought you would. Instead of repainting a new, larger texture map, you can simply transfer the existing surface painting to a new, larger map, with no rework necessary.
• Similarly, the UV unwrapping need not be fixed in advance. If one unwrapping proves unsatisfactory, simply create a different unwrapping and transfer the surface painting to that map.
• Removing UVs from your model frees up system resources and allows you to work with more polygons.

To learn more about Projection Master click here.

To learn more about Polypainting click here.

Read The PolyPainting Tutorial Paint It!