How Texture Mapping in Rhino relates to Given Texture size in VRay

Rendering V-Ray
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Hello All,

I am sorry if this question is a bit basic, I have been reading through the manuals for vray and rhino over the past couple of days trying to figure this out. I am hoping for some confirmation regarding how to duplicate the real world size of a vray texture (typically mm or cm from what i see) when texture mapping in rhino. When in the texture mapping tab in rhino for a given surface/polysurface there is the x,y,z size, which I understand to be the dimensions, in model units, of each tile for the selected surface. There is then also the UVW Repeat options, which I understand to be the number of times the texture is placed in each tile (eg. if the texture is a a pattern then as this number decreases the pattern is spread over a larger area and appears larger).

My question is when I am using a vray material with a given size, say 500mmx500mm, how do I use the x,y,z size with UVW repeat so that in my render the material is of the same dimension?

A common case for myself at the moment is a x,y,z size of 2,2,2 which I understand to by a cube of 2mm on each size. In this case, if I have a material with given real world dimensions of 500mmx500mm, would I set the UVW repeat values to (2/500) for each direction?

Thank you very much.

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Hello,
if you create a UV map with the values ​​e.g. x2, y2, z2 and your model is in meters then the UV is 2x2x2m and Vray uses this in the same way. If, for example, your texture in the Vray material has a real size of 1.2x2.6m, then your UV must be 1.2x2.6 when you create it if your model is in meters.