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The Bump Material gives the ability to add bump map and normal map effects when using any material.

Simply apply a Bump Material to an object to add additional bump or normal map functionality. Stacking multiple Bump Materials together can create a more complex surface material by allowing the use of several bump and or normal maps together easily.

One of the common use cases of the Bump material is to produce a Round Edges effect for other materials with already existing Normal or Bump mapping. The correct workflow is the following:

  1. Have a material with set up Bump or Normal mapping;
  2. Create a Bump material set to Bump Texture Channel mode and connect an Edges texture for the rounded corners effect;
  3. Slot the first material into the Bump material to achieve the combined effect.
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UI Path

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||V-Ray Asset Editor|| > Materials (right-click) > Bump

||V-Ray Asset Editor|| > Materials (left-click) > Bump



UI Options

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The Bump material settings are organized in Basic and Advanced modes. You can switch the mode from the toggle button under the Preview Swatch or globally from the Configuration rollout of the Settings tab.

From the Add Attribute button, you can select additional attributes that can add up to the appearance of the material. For more information, see the Attributes section.

An Add Layer button is provided for some V-Ray materials, including Bump. You can select an additional layer that can add up to the appearance of the material. For more information, see the Layers section on Materials page.

The Bump material itself can be created by adding a Bump layer.

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Holding down Ctrl (or Cmd on macOS) while having the Add Attribute or Add Layer menu open, allows selecting multiple entries without closing the dropdown.

A Reset option is provided in the context menu of each Number Slider. You can reset the slider value to the default one.

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Parameters

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Base – Allows the user to select the base material to which the bump/normal effect is added.

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Bump

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Mode / Map – Allows the user to specify whether a bump map or a normal map effect is added to the base material.

Bump Map – A height map should be used.
Bump Texture Channel – Most commonly used for the Round Edges effect (Edges texture used as bump).
Normal Map – RGB map should be used. If a Bitmap texture is slotted its color space must be set to Rendering Space (Linear).

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With V-Ray 5, update 2, all Normal maps of newly-created materials are calculated in Tangent space. The options for Object/World/Screen space normal maps are now considered legacy options. They remain unchanged in materials from older scenes unless the materials are updated to a non-legacy bump mode. In this case, the legacy options cannot be restored back.

Amount – A multiplier for the bump/normal map.

Delta Scale – It specifies a scale for sampling the bitmap when Bump Map is selected. The exact value is calculated automatically by V-Ray, but can be scaled here.

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Binding

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Binding – Enables connection/binding between V-Ray and the corresponding base application material.

Color – Enables color binding. Changing the V-Ray material color changes the corresponding base application material color and vise versa.

Opacity – Enables opacity/ transparency binding. Changing the SketchUp material transparency, however, does not change the V-Ray material. Instead, it disables the Opacity binding.

Texture Mode – Enables texture binding. Changing the V-Ray material texture changes the corresponding base application material texture and vise versa.

Auto – Binds the Diffuse texture to the base app material.
Texture Helper – Allows for the use of a helper texture as base application material map. The same helper is used if the binded texture is a procedural map. This is useful every time you have to set texture placement for a map that cannot be displayed accurately in the base app.
Custom – Allows for the use of a custom texture as base application material map.

Disabling this parameter allows for changing the base app material texture without affecting the V-Ray material.

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Override Control

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Can be Overridden – When disabled, the material is not overridden by the Material Override option in the Render Settings.

 

 

Attributes

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The attributes from the following expandable menus are available for the Bump material.

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Attributes
Attributes

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Material ID

 

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ID Number – Isolates objects as an R/G/B mask in the MultiMatte render elements.

ID Color – Allows you to specify a color to represent this material in the Material ID VFB render element. 

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Each material is assigned with an automatically generated ID Color.

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Notes

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  • The 2D mapping (landscape)  method only supports one UV mapping channel.