reflect/refract interpolation ?

[chow choppe]

hi everyone

 

i have never been able to undrstand whats teh use of "use interpolation" in reflection/refraction of vray material. i read the definiton on spot 3d but i am not able to understand what does it help in practically and when to use it?

 

any comments

 

thanks

[DavidR]

It allows you to set hsph subdivs and interp samples separately from global subdivs, usually to smooth out a material that otherwise looks too grainy; it's usually used as a cheat to reduce render times, but I generally avoid it because it sometimes looks awful, and because you shouldn't use it for animations.