Although you can use the 3D Paint Tool to modify a texture by painting directly on the surfaces the texture is applied to, you can also modify the texture in the canvas and immediately see the effects on the surfaces.

To modify a texture applied to a surface

1. Apply the file texture to the surface. For details, see the Shading guide.
2. Open Hypershade, if it is not already open (Window > Rendering Editors > Hypershade).
3. Using the middle mouse button, drag the applied file texture onto the canvas.
   Tip

   To paint on Maya textures (for example, checker or fractal), select the surface the texture is on and in Hypershade, -select the texture. Still in Hypershade, select Edit > Convert to File Texture (Maya Software). Now drag the converted file texture onto the canvas.

4. Select Canvas > Save > and turn off Save Alpha.
5. Set Paint Effects to save the canvas after each stroke (Canvas > Auto Save or click the folder icon on the toolbar).
6. Change your layout to display both the canvas and a view of your scene (for example, Panels > Layouts > Two Panes Side By Side).
7. In the scene view, turn on Hardware Texturing (Shading > Hardware Texturing).
   Tip

   To improve the display quality of the texture, open the Attribute Editor for the shader, expand Hardware Texturing, and change the Texture resolution to the desired setting. On Windows, you may need to set the quality to something other than Default to see the texture update.

8. Paint on the canvas (see Paint on the canvas). The texture updates on the surfaces it is applied to each time you release the mouse button.
   Tip

   You can paint attributes that you can’t see through Hardware Texturing (for example, bump, incandescence, transparency) and see the effect on the surface it’s applied to using IPR.

   • Assign a texture to the required attribute of the shader and apply the shader to the surface. For details, see the Shading guide.
   • In Hypershade, use the middle mouse button to drag the texture node onto the canvas.
   • Set Paint Effects to save the canvas after every stroke.
   • Do an IPR render of the surface and select the area you want to view. For details, see the Rendering guide.
   • Paint on the canvas.