Base material – The base material over which other materials are layered. If this is not specified, the base material will be assumed to be a perfectly transparent material.
Additive mode – Checking – Checking this option makes VRayBlendMtl to behave behave like a multi-layered Shellac material. Note that this 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.
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Coat Materials
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Add New Item – Adds a new Coat material.
Coat material – Specifies materials to use as coatings.
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 amount is black, a 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.
UI Text Box
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The arrows on the right reorder the coat material slots, whereas the bin deletes the coat material slot.
