TexFalloff vray material

Rendering V-Ray
1

I’m trying to create a material with the texture option TexFalloff.
Ideally It should be a falloff from white to transparent. However, I’m using white and red for now so that I can see what’s going on.
I’m applying the material to a sphere for testing (attached). However no matter what I do I get always the same result regardless of the values far and near …

Here are the parameters I’m trying:
Color 1: white via Texcolor
Color 2: Red. Eventually I need it to be transparent though.
Type: Towards/Away
Local Z (I assume this is based on the local origin and axis of the object)
Angular Blend: Not applicable since I’m using Towards/Away as type
Distance blend: Here is what I’m not sure …
Would the ‘near’ value be the distance from the z-origin where color 2 starts and anything below that would be color 1?
Would ‘Far’ be the z-value where color 2 stops ?
Also, I assume that these values are in model units?
I’ve tried many combinations and I can’t make it work and I couldn’t find any reference to it in the documentation …
I’d appreciate some help.

falloff.jpg893×529 76.4 KB

falloff.3dm (481.5 KB)

2

Change the Angular Blend → Start Angle and End Angle to move the ‘transition zone’. If you try 90 [degrees] in both, you’ll get a sharp border at the equator and it will all make sense.

3

Thanks Dave I’ve tried that but the angular blend angles seems to matter only when the falloff type chosen is “angular blend”. I want the Towards/Away method so that I can control the height along the z axis. I wonder if there’s a bug and it’s not doing what it’s supposed to do …

1 Like
4

There’s no bug… unfortunately there’s no gradient in Vray for Rhino as on 3d Max…

Anyway i found an old manual with an alternative, give me 10 minutes and i’ll upload an screenshot

5

Do you want something like this?

LS_023.jpg600×600 134 KB

6

What? No, not at all.
Please read the first post. Does this example have a color falloff or is it the shadow that makes it darker?

7

ok,

color falloff from black to orange

8

I see , sorry.
Did you use the z axis and Towards / Away type ?
My problem is controlling the z position of the transition. Changing the values Near-Far doesn’t make any difference. See the attached model in the first post