Reflection Falloff
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oganocoli was right just use fresnel refelction and blurrying it
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The first image is definitely just a blurry reflection. Like oganocali says - using .85 for glossiness would work fine. The second one has an accentuated falloff without the blurriness. I wonder if it's just a lower IOR value, like 1.2
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I have trouble replication the graduated fall off effect in picture 2. In theory fresnel reflection should do it for small ior. Somehow vray fresnel reflection falls off too abruptly as in total internal reflection as seen (ior 1.2). I am pretty sure I have the correct surface orientation but... Apparently vray is doing some kind of approximation for this reflection. I am pretty sure the physics require a smooth graduated fall off. Strange.
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do you have a filter color for the reflection layer? I see that effect sometimes if the filter color is too dark. Set it at white and see if you still get that effect.
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oganocali: remember that you also need to make the reflection blurry in order to reproduce the original image posted.
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@andybot: I don't have a filter.
@thomthom: I was trying to reproduce the effect in the 2nd picture. I feel that one does not have blurriness.Well, just before the reflection drops to zero there is a small graduated region I think, may be I am imagining it.
There seems to be something I am missing. -
Wow, I must be dense! I dont know why I didn't realize Fresnel did this. I have used it a million times. What what you use if you wanted it to fade off in a shorter distance? Would you just change the IOR value?
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@valerostudio: Smaller value of IOR should make the reflection fade off earlier as I understand , but somehow in vray the reflection dies off more completely and abruptly than I expect.
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I did use falloff once for such an effect in 3dsmax. Found it, then, easier to control in that situation than fresnel.
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But we all agree that fresnel is the best solution for realistic reflections? Would you ever just use a color value to control the reflection amount and not use fresnel?
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@valerostudio said:
But we all agree that fresnel is the best solution for realistic reflections?
Yes
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