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reflection falloff in vray
show user profile  mike_renouf
I'm sure there's something straightforward that I've missed..

I want to create some quick rendering reflections on a material in vray, but to make them subtle. I turned glossiness to 1, and reduced the subdivs. This means I'm going to get a mirror-like finish. Then I figure I can put a falloff map into the reflections slot and change the falloff type to fresnel. The final result should be a crisp reflection which fades out to nothing after a short distance.

Theory's fine. And it works in this vid (skip to 5 mins 40)


I get a dimmed reflection, but no graduation.

Any ideas?


read 2211 times
4/9/2014 12:18:37 AM (last edit: 4/9/2014 12:18:37 AM)
show user profile  luxxeon
Why r u using Arch Design materials with Vray? Use Vray material, with built in fresnel refections.

My Youtube Video Tutorials:
read 2196 times
4/9/2014 2:16:11 AM (last edit: 4/9/2014 2:16:11 AM)
show user profile  mike_renouf
Sorry maybe I wasn't so clear.

The video is one I found on YouTube, by someone who is clearly not great at making tutorials, but managed to get the effect I am looking for. He starts with an arch & design material, realises he's screwed up, then switches to vray material.

I am using vray materials and following the process, but cannot get it to work. I suspect that just using the fresnel parameter in the vray May will have the same effect? I thought a falloff map might be easier to control though. Maybe the angles I am looking at are wrong, but I don't think so - I think the falloff is not working.

read 2180 times
4/9/2014 10:07:21 AM (last edit: 4/9/2014 10:07:21 AM)
show user profile  FX
Sorry can't help, but I had the exact same problem a few weeks ago and gave up on it, I was hammering away for hours with the settings and nothing would work, vray materials need presets :)
read 2167 times
4/9/2014 1:23:02 PM (last edit: 4/9/2014 1:23:02 PM)
show user profile  herfst1
I would do it post production style if you can't find an in-engine solution. Render out the elements and let PS do the rest.
read 2165 times
4/9/2014 1:39:44 PM (last edit: 4/9/2014 1:39:44 PM)
show user profile  mike_renouf
Sussed it I think. It is actually built into the vray shader. Dim distance and Dim fall off are the parameters. Dim distance is in scene units (e.g. metres, mm etc). The dim fall off changes the gradient used.

read 2151 times
4/9/2014 9:54:40 PM (last edit: 4/9/2014 9:54:40 PM)
show user profile  9krausec
I don't know what you are talking about. But I made this..?

- Portfolio-

read 2144 times
4/9/2014 10:20:00 PM (last edit: 4/9/2014 10:20:00 PM)
show user profile  mike_renouf
That's pretty much bang on. I'll post a pic of what I achieved later if I get a moment.

read 2130 times
4/10/2014 8:53:50 AM (last edit: 4/10/2014 8:53:50 AM)
show user profile  9krausec
Great. If you are still having issues let me know what max version you are running and I'll post up my scene for you to DL to double check everything.

Good luck.

- Portfolio-

read 2117 times
4/10/2014 12:52:42 PM (last edit: 4/10/2014 12:52:42 PM)
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