Arrow Group Industries LM86 Manual do Utilizador descarregar pdf (Página 128)

Maxwell Render 2.5 User Manual

Chapter 14. Appendix I. Materials Examples | 128

f. Example 6: Clipmaps using layer mask

Clipmaps are easy to create. Use the layer mask image to make an object visible in some

parts and invisible in others. Clipmaps are useful for leaves, decals, perforations in objects,

and even to simulate objects using a single-textured plane (people, vegetation, etc).

Fig.01 Grass by thxraph Fig.02 Wire mesh by F_Tella

First, create a material as usual (reectance, transmittance, Nd, roughness, etc). Then

load the clipmap to the layer weight texture slot. White areas show the material as it

is and darker areas make the layer vanish slightly. Pure black areas will make the layer

completely invisible, allowing you to see the layers underneath.

If there is only one layer in the material, the black areas of the clipmap will make the

object invisible.

More clipmap material examples at the MXM Gallery

g. Example 7: Multi-layered material

Maxwell Render’s stacked layers system allows you to create complex and very sophisticated

materials. Each layer corresponds to a specic material, so each layer can contain several

BSDFs blended together, coatings, SSS, etc. Think of a layer as a complete material on its

own, with its own displacement, BSDFs, and coatings.

Fig.01 Rusty Chrome Metal by Miguel Fig.02 Cigarette Break by rusteberg

To create a partially rusty metal sheet, begin by creating the rust layer. Apply a Re 0º

map and a bumpmap. Roughness should be a high value (for example 100). Name this

layer “rust”.

Now create a new layer over the rst. Name it “paint”. You can use the Wizard to quickly

apply a car paint material. Or combine two or three BSDFs to copy the look of a clean,

newly-painted metal sheet. Adjust the weight value of the “paint” layer to mix it with the

“rust” layer underneath, or better, use a grayscale map as a mask to remove the “paint”

layer from certain areas, allowing for the rust to peep through.

You can also load a global bump/ normal map that will be applied to the whole material

from the Material Properties row in the Layers list. Each layer can have one displacement

component but only one of the displacement components will be used for rendering. You

can specify which one you wish to use for rendering in the Material Properties panel.

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