Difraction, aberration, etc ..

[Alex Doss]

Guys,

Can I do difraction effect in Vray ? meaning that light gets distorted inside the refraction area, and you can see diferent shades of color in the refraction map.

[s7en]

Do you mean something like this?

http://myweb.tiscali.co.uk/elvis/dispersion.html

[Alex Doss]

YES !
like that
http://myweb.tiscali.co.uk/elvis/dimages/scenehdri.jpg

How in hell didja do that ?

[s7en]

I've uploaded the max4 scene file here:

http://myweb.tiscali.co.uk/elvis/dim...rsion_hdri.zip

the image you referred to is rendered from file dispersion test06.max
i've also included a subsequent version you might want to check out.

The material is a variation on the shellac material in the dispersion.zip file you can download from my dispersion page (see above post for link)

Looks like you'll also need blur's multiblend plugin, which you can get at
http://www.maxplugins.de/
do a search for multiblend

And I'm using the popular kitchen hdri map from
http://www.debevec.org/Probes/
for some reason I'm using the kitchen_cross.hdr. Not quite sure why I switched to cubic format for this scene.

The scene really needs antialiasing to get good results, which unfortunately slows the rendering down A LOT.

Like you may have already read on my dispersion webpage, its a material that blends together seperate red, green and blue materials, each with slightly different IOR values which when additively blended together produces the colour shift. The greater the difference in IOR values between the red, green and blue submaterials, the greater the colour shift.

Theres a bug where you the material may not render when the files is first loaded. In which case go to the material editor, and drag instanced copies of each submaterial into a new slot in order to 'wake them up'.

sven

[Alex Doss]

You´re da Man !

Indeed it´s preety slow rendering, but that gave me an idea, of finishing that using the same idea with compositing.

I´ll try that, and post here any results that may be worth for the comunity

again, thanks a lot for that reply !