The Blend node can be used to layer several V-Ray-compatible surfaces in an efficient manner. It can be used to create complex materials like car paints, human skin (when used with VRayFastSSS2 as with V-Ray Fast SSS 2 node as a base material) etc.
You can use the VRayMtlSelect render the Material Select render elementto split the different sub-materials of Blend into different render elements.
The Blend node takes a base material and applies other materials (coatings) on top of it. This works like a stack, where each coat material blends between its own shading and that of the materials below it in the stack.
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Base Material – The base material, over which other materials are layered. If this is not specified, the base material is assumed to be a perfectly transparent material.
Mode – Select how to use the V-Ray Blend Material to behave: like a multi-layered Additive material or as Energy Conserving. Selecting the Additive Additive mode would often result in a physically incorrect material (e.g. a material that reflects more light than falls on it). It is not recommended to use this option unless you know what you are doing.
Add Layer – Adds a new coat layer.
Remove Layer – Removes the layers.
Coat Material – Enables the layer. When disabled, the layer is not calculated in the material during rendering.
Blend Amount – Specifies how much of the final result is contributed by the corresponding coating material, and the rest of the materials below it. If the Blend amount is white, the final result is comprised of the coat material only, and other materials below it are blocked. If the Blend amountAmount is black, a the coat material has no effect on the final result. This parameter can also be controlled by a texture map.
Opacity – Defines the strength of the layer.
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Transparency – Specifies how transparent the Blend Node is. Black makes the material fully opaque and white makes it fully transparent. A texture node can also be used here.
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MATERIAL ID
Material Id Enabled – Enables the use of Material ID.
Round Edges Enabled – Enables the round edges effect which uses bump mapping to smooth out the edges of the geometry during render time.
Radius – Specify a radius (in world units) for the Round Edges effect. Since the actual geometry is not being changed and only the normals of the faces are affected, large values may produce undesirable effects.
Consider Same Object Only – When enabled, the rounded corners are produced only along edges that belong to the object, which has the attribute applied. When disabled, rounded corners are also produced along edges formed when the object with the attribute intersects other objects in the scene.
Corners – Choose which edges are considered in the calculation. Possible options are:
Covex and Concave – Considers all edges. Convex Only – Only applies Round Edges effect to edges with convex angles. Concave Only – Only applies Round Edges effect to edges with concave angles.
