Can't get shadows blurred by frosted glass

[papalama]

Hi!

Let me explain what I mean by a real life example of matt plastic plate what makes shadows of objects placed behind it blurry:

[ATTACH=CONFIG]43121[/ATTACH]

 

Unaffected shadows i've got of V-Ray rendering:

[ATTACH=CONFIG]43122[/ATTACH][ATTACH=CONFIG]43123[/ATTACH]

 

My numerous attempts to get shadows blurred by glass plate led to nothing so I began to doubt whether it is possible?

[Thablanch]

You can do this by following this tutorial:

 

http://www.richardrosenman.com/project/imagesandmore/?cid=85

 

Hope it helps.

[papalama]

I meant influence on shadow:

[ATTACH=CONFIG]43138[/ATTACH][ATTACH=CONFIG]43137[/ATTACH]

 

But thanks anyway, nice tutorial )

[Thablanch]

That's what I ment also...

The Fog "should" affect shadows as well

[papalama]

Influence of 'glossiness' parametre on shadows blurriness seems to me even more reasonable, but anyway:

[ATTACH=CONFIG]43139[/ATTACH]

[Stephen Thomas]

I'm not sure, but perhaps you need to enable caustics for this to work. As far as I know the 'affect shadows' option for refractive materials is just a quick and dirty shortcut and not totally accurate.

[Stephen Thomas]

Yeah, caustics is definitely the way to do it. Here's a quick test as an example. Target direct light with vray shadows, caustic subdivs at 100,000; simple glass with refraction glossiness at 0.9; global caustic settings at multiplier=1, search distance=0.2m, max photons=4000.

 

But you can experiment with the values, I'm no expert on this by any means!

[papalama]

Hi, Stephen!

 

I've followed your advise and got caustics of glass itself...

[ATTACH=CONFIG]43258[/ATTACH]

but nothing more....

at least I saw it's possible

Have no idea what's missing in settings...

Edited June 9, 2011 by papalama

[Stephen Thomas]

Have you turned 'affect shadows' off in your glass material? If you're using caustics this should now be disabled.

[papalama]

It works now!

 

[ATTACH=CONFIG]43269[/ATTACH]

 

So, as i see, with caustics set on, distribution of reflected and refracted light is actually calculated, but it's placed over the 'transparent shadow'.

 

'affect shadows' in 'fog' section is not very obvious, but i think i could figure it out myself, with more attention to The Manual maybe

Thanks a lot!

[Judge2x]

I was almost ripping my hair out - I was using a vray light, sphere, for my scene & couldn't get the diffused shadow to work through glossy refraction. Finally tried a max default light - target direct w/ vray shadow or area shadow & the darn thing work.

 

...That's crazy, vray caustics dont work with vray lights? (at least for me - maybe I did not enable something.)