Arrow Group Industries LM86 Manual do Utilizador descarregar pdf (Página 72)

Maxwell Render 2.5 User Manual

Chapter 10. Maxwell Materials | 72

1. Step 1. It is always a good idea to start by turning off reectance, setting the

reectance to black and roughness to 0 to avoid creating reections or specular

effects on the surface. This will give you full control over SSS without introducing

other effects. Now, set the transmittance, attenuation and Nd as if you were creating

a typical glass material, but avoid setting a high attenuation. This will give you a dark-

colored glass material as seen in Figure 1.

2. Step 2. Put particles inside the medium so that subsurface scattering occurs. Leave

the scattering color set to grey or set another color, and increase the coefcient to

150. This will give you a material similar to the one in Figure 3: you have already

created a simple translucent material. The incoming white rays are ltered when

they hit the surface with the help of Step 1 and the green rays travelling through

the object are being scattered with the given particle reectance color and particle

quantity. Figure 2 was rendered using a de-saturated transmittance color with the

same settings to show the subtle subsurface scattering effect.

+ =

F.01 Transmittance F.02 SSS (isolated) F.03 Transmittance + SSS

So even with zero reectance, roughness has an effect on the diffusion of rays. The

rest of the parameters including abbe, r2, anisotropy, angle, and bump are fully

compatible with subsurface scattering, allowing you to simulate the corresponding

effects at the same time.

How to make a translucent material

Step 1 Step 2

1 2 ... 67 68 69 70 71 72 73 74 75 76 77 ... 166 167

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Arrow Group Industries LM86 Manual do Utilizador Página 72