Creating a Material that Shows Patches of Two Image Maps

Sometimes you need to create a material that shows discrete patches of two image maps. In the steps that follow, you learn how to use Noise to combine two image maps to create a patchy diffuse map. You can use the technique illustrated here to create patchy Bump maps, patchy Opacity maps, even patchy self-illumination maps.

In this particular example, you mix dirt and clouds to create a planet 'material'.

1. Select the Material Editor icon to launch the Material Editor.

2. Select the sample sphere you want to work in.

3. Select the Maps rollout, if necessary, to display the map options.

4. Select the Diffuse Map button.

5. Select the Noise option.

6. Select the top button under the word Maps in the Noise Parameters section of the command panel.

7. In the Bitmap command panel, select the Bitmap button.

8. Select the image you want to use to create most of the patches.

9. Select OK to exit this dialog box.

10. Select the Go to Parent icon.

11. Specify a bitmap for the second map.

12. Specify the Size of the patches by entering a value in the Noise Parameters section of the command column. Larger numbers make for larger patches.

13. Specify a value for the High field. This specifies how much of the first map you want to see. The maximum value is 1.

14. Specify a value for the Low field. This determines how much the patches of the second material blend into the first. Low values result in lots of blending, while high values result in no blending.

15. Press the ENTER key.




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