Results 1 to 7 of 7

Thread: Chromatic aberration in glass

  1. #1
    Registered User
    Join Date
    Mar 2012
    Location
    Japan
    Posts
    123

    Chromatic aberration in glass

    Hi, for my second post today I would like to ask if anyone have a recipe to cook some nice CA in a glass material...

    here my reference:

    Click image for larger version. 

Name:	7cb9a9c130eaf756c5486fd144dd7fb9.jpg 
Views:	772 
Size:	232.4 KB 
ID:	120623

    thanks

  2. #2
    Goes bump in the night RebelHill's Avatar
    Join Date
    Nov 2003
    Location
    jersey
    Posts
    5,792
    Sure...

    You can use the dispersion setting in either dielectric or refractions to do this... though the effect can often lack "punch" and you have little control.

    For designing a custom effect, the simplest way is to use multiple refraction shaders, each set to a slightly different ior, split out to a colour component from each, and then recombined back into a full spectrum.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	refractCA.jpg 
Views:	547 
Size:	149.3 KB 
ID:	120624  
    LSR Surface and Rendering Tuts.
    RHiggit Rigging and Animation Tools
    RHA Animation Tutorials
    RHR Rigging Tutorials
    RHN Nodal Tutorials
    YT Vids Tuts for all

  3. #3
    Registered User
    Join Date
    Mar 2012
    Location
    Japan
    Posts
    123
    Thanks RebelHill for the fast reply! I was not even expecting a solution and here I got a fast and easy one. Very appreciated. I'll try this right now.

  4. #4
    Registered User
    Join Date
    Mar 2012
    Location
    Japan
    Posts
    123
    You absolutly need to add Refraction blur to get that effect? (Adding blur make the renders so long...)

  5. #5
    Goes bump in the night RebelHill's Avatar
    Join Date
    Nov 2003
    Location
    jersey
    Posts
    5,792
    Im not using any blur... Difference refraction indices on each node, not blur vals.

    And btw... for an effect following the basics of reality... You use the green ior as teh "standard" ior for your material... red refracts slightly less, blue slightly more.
    Last edited by RebelHill; 03-06-2014 at 11:45 AM.
    LSR Surface and Rendering Tuts.
    RHiggit Rigging and Animation Tools
    RHA Animation Tutorials
    RHR Rigging Tutorials
    RHN Nodal Tutorials
    YT Vids Tuts for all

  6. #6
    Super Member XswampyX's Avatar
    Join Date
    Aug 2010
    Location
    Kernow
    Posts
    2,079
    It looks great! Nice and simple too.

  7. #7
    Registered User
    Join Date
    Mar 2012
    Location
    Japan
    Posts
    123
    Difference refraction indices on each node, not blur vals.
    Excellent!

    Is there's a way to blur the refraction without using the standard Blur Refraction that is so long to render?

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •