scale of materials in renders.

[vanderloo]

Trying to get my head around the relationship between drawing scales vs. material scales, (if that makes sense).
Bringing a model into max via revit to .dwg conversion, with my system units set to inches, It seems like there is a scaling conflict between the vray materials and the model.
Or, for whatever reason, the materials seem completely different in the renders than they do in the material editor preview.
I created this wall texture, which looks perfect to me in the material editor slot, but in the render the texture is huge.(notice the ceiling in this frame buffer shot). Not at all like the material preview.
I have the bump map set to 2.
Is there some way to check and adjust the scale of the material to be compatible with the model scale?
Thank You

[dejan]

A couple of suggestions:
a) adjust "Tiling" in the diffuse map properties (or "size" if you're using real-world scale)
b) ad a UVW map modifier and adjust size there

You can't rely on the shader ball's map scale to know how it will look in the render. I can see from the screenshot that materials are shown in the viewport. Use that to judge their scale. If a specific material isn't shown then just click on the "show shaded material in viewport" button.

[Morne]

...You can't rely on the shader ball's map scale to know how it will look in the render

You can actually (if it's not procedural or some other special type). By default, if your system units is metric, the shader ball is 3 meter wide and the texture is 1 meter. You can use this scale to see how your material would look like on a 3m ball.
If you don't like the ball to be 3m, then just change it.

Go to the material editor's options, then change the "Render Sample Size" to whatever you like. This will change the ball size. This is VERY USEFUL on refractive objects for example with a fog color. With default settings, the ball is too big to see through a glass ball (for a typical green bottle for example). But change the ball to 10mm for example, then things start making a lot more sense

[dejan]

That's good to know, thanks for the tip.