Falloff material based on worldspace?

[Pete]

Hi there,
Just wondering if anyone could help me out with this shader, I was trying to control mixing between two colours by the position in world space (along one axis). So at say Y 0 the mix would be black then as it approached Y 1 it would blend to white.
Any ideas?
Thanks
Pete

[Memag]

I guess you could right click on "weight" divot and "link with".
In parameter connection editor "link" it with "global.posy" and set relative values how you want 'em (white when y=1, black when y=0).
Then click on "L" which appears as a divot and in animation editor set curve to linear , if you want nice and even transition.



There are probably faster ways through expressions and ICE. Hopefully someone will provide you with them.

[rray]

You get less control than with Memag's approach, but you can do it directly in the render tree doing this: Take a "Vector State" render tree node, set to "Intersection Point" -- this returns the position of the rendered point, which you can extract the Y of.