3D Graphics, Tutorials and Tips
Using 3DS Studio Max and Mental Ray
DMMultimedia | 3d tutorials | mr Paint Techniques | Texturing : Raytrace paint
This looks OK, but a little simplistic. We can add depth to the paint by using a Fall-off map in the diffuse slot, so that the colour changes depending on the angle viewed (in the same manner as the reflectivity). Add a Fall-off map to the Diffuse slot :
And with the following setup:
Rendering with this Fall-off map in the Diffuse slot will give us:
The addition of fall-off to the colour produces more depth to the paint effect. But, we can also add a little speckle to speculars to fake metallic flakes. To do this we need to adjust the material's Glossiness values as shown below:
Add a noise map to the Spec. Level slot, and a noise map to the Spec. Color slot.
Adjust the settings of the noise modifiers as follows (again the size settings will depend on the scale of your model/scene).
Uisng the above settings we get the following render - notice the specular blume is now scattered and coloured:
This paint is shown below rendered on the Schnorbill model. Experiment with different colours and falloff for different paint effects. In the next section we will look at adding more complexity to the falloff maps.