How to Paint on 3d models in photoshop

I have just began to study Photoshop. Now I have created a 3D model by 3D tool and now I want to paint on the 3D model. I know that we can use 3D tool to realize, but I don't know how to operate. Any help is appreciated.

You can use any Photoshop painting tools to paint directly on a 3D Models just as you would on a 2D layer. Use selection tools to target specific model areas or let Photoshop identify and highlight paintable areas. 3D menu commands let you clear away areas of a model to access interior or hidden portions for painting.

When painting directly on the model, you can choose which underlying texture map to apply paint on. Typically paint is applied to the diffuse texture map, which gives a model material its color properties. You can also paint on other texture maps, such as the bump map or opacity map. If you paint on an area of the model that lacks the type of texture map you're painting on, a texture map is automatically created.

1. In Photoshop CS4, open the 3D file which you want to paint.
   
   
2. Then use the 3D position tools to orient the model so that the area you want to paint on is facing forward.
   
   
3. If you are painting on curved or irregular surfaces, you can get visual feedback before you paint of which areas can best receive paint. Select Select Paintable Areas from 3D menu.
   
   
4. Set the paint falloff angle by choosing 3D Paint Falloff from 3D.
5. In the 3D panel, select the Scene panel. Choose a map type from the Paint On menu.
   
   
6. Using any selection tool, create a selection on the 3D Models to restrict the area that you want to paint on.
   
   
7. Apply paint using the Paintbrush tool.3D Models You can also use any other tool in the second section of the Tools panel, such as the Paint Bucket, Smudge, Dodge, Burn, or Blur tools.
   
   
8. While painting (after completing a stroke), you can view the effect of the painting on the texture map itself. Double-click the texture map in the Layers panel to open it.
   
   That's the result of painting on 3d models
   

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