After painting strokes on an object, you can convert the strokes into a texture, which you can then reapply to the object. You may want to do this if you need to render the images outside of Maya (for example, in a game engine). 
This technique remaps the strokes painted on the object to the same UV space in the texture. 
To create a texture map from a painted 3D object
- Paint the strokes on a paintable object. For details, see Paint on objects. 
- Select all the strokes on the object. 
- In the Attribute Spread Sheet, click the Shape Keyable tab. 
- Select all the values under the Perspective column and change them to off. (Changing Perspective to off is the same as selecting Position Stroke on View Plane.) 
- Select Windows > Rendering Editors > Render Settings, and set the render resolution to be square (for example, 320 x 320). 
- Hide the object you painted on so that it does not render. 
- Perform a test render of the scene (Render > Render Current Frame). 
- Modify the Global Scale of the strokes, if necessary. 
- Select all the brushes. 
- In the Attribute Spread Sheet, click the Keyable tab. 
- Under the Global Scale column, adjust the scale appropriately for each brush. 
 
- Render the scene (Render > Render Current Frame). 
- Save the rendered image. You can now create a texture from this image and reapply it to the object.