When creating a V-Ray VolumeGrid, what is the purpose of the material sphere behind the V-Ray VolumeGrid

[123456_1]

Just like in the picture, every time you create a V-Ray VolumeGrid, it comes with one. What is its function:face_with_spiral_eyes:

[deyan.hadzhiev]

Hi @123456_1 , the material assignment tag (or simply texture tag) is there for convenience. The VolumeGrid object has several texture parameters which all need object space mapping (in 3D), and the native way in Cinema4D to have and control that mapping is from such a tag, even if it has no material assignment. Having the tag allows you to easily change the texture mapping transformation that will be used by textures in the VolumeGrid (see the example below). Since this is not very intuitive, we decided it would be easiest if the texture tag is created by default with the object.
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[123456_1]

@deyan.hadzhiev

Hi @123456_1 , the material assignment tag (or simply texture tag) is there for convenience. The VolumeGrid object has several texture parameters which all need object space mapping (in 3D), and the native way in Cinema4D to have and control that mapping is from such a tag, even if it has no material assignment. Having the tag allows you to easily change the texture mapping transformation that will be used by textures in the VolumeGrid (see the example below). Since this is not very intuitive, we decided it would be easiest if the texture tag is created by default with the object.

Thank you for your answer:)