Blur edges of refractive convex object

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  06 June 2013
Blur edges of refractive convex object


I'm working on a scene where there is, for lack of better words, a large glass vat/jar filled with liquid.
However, while I can get light refraction/stretching working fine, I can't get the edges to sort of 'smear' and blur like they do in real life.

For example:

See how the light bends and smears quite dramatically where the water is, but becomes clearer towards the center? That's the sort of effect I wish to achieve.

From what I could find [since I'm not even sure what this effect is called], I need to make use of a falloff map, but I have no idea where to go from there.

Any ideas?
  06 June 2013
If i'm understanding you right, you need this (scroll down for "Water and Liquids" part)

(If i remember correctly somewhere in vray help there is this same or very similar explanation, so dig for it if you use vray).

Also, caustics.
  06 June 2013
Huh, thanks for that. (sorry about the late reply, got carried away with other projects >_>)

I had read that in the past, but it looks like I forgot it, cos I was using proper 'block' geometry instead of interfaces. =P

But either way, this didn't really solve the issue. =/
There is stretching, sure, but it's not blurred/smeared the way it's meant to.

I'm not 100% certain, but I don't think caustics will help much at all, in this instance.
  06 June 2013
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