Closed Thread
Results 1 to 3 of 3

Thread: White outline of objects (halo) after combining Vray render elements in PS

  1. #1
    Junior Member
    Join Date
    Aug 2015
    Posts
    7

    Name
    Paul Zet
    Forum Username
    paulzet



    Question White outline of objects (halo) after combining Vray render elements in PS

    So after I stack Vray elements into photoshop, there is always a white outline or halo visible when the object borders a reflective or refractive element.

    This is the RGB render:
    http://imgur.com/q2wtRI3

    This is the composite with RawGI, Diffuse, Refraction, Reflection, and Dirtmap
    http://imgur.com/zJsQBCD

    I have read other threads with people use the defringe and remove mattes in PS, but none of these work for me since these halos don't occur around transparency.

    Any help would be great!

  2. #2
    Veteran Member
    Join Date
    Dec 2011
    Location
    Boston
    Posts
    1,131

    Name
    Corey Beaulieu
    Forum Username
    CoreyMBeaulieu

    United_States

    Default Re: White outline of objects (halo) after combining Vray render elements in PS

    I don't know how you are compositing these passes in PS, but they are not how the RGB is created so I would expect differences.

    GI + Lighting + Refraction + Reflection +Specular + Self Illumination + Atmosphere + Background = RGB. Raw is not necessary nor are the filters unless you want to introduce something not in the 3D Scene, and Atmosphere and Background are usually not included, but would need to be if you use those features.

    Your comp should be in 32-Bit and every (+) should indicate the Add/Linear Dodge blend mode.

    Dirt is not something that should be included as it is not baked into the final render and if memory serves, this may be the cause of your halos as something is wrong with the pre-multiply. Well, it isn't wrong, the pre-multiply is against white on the Dirt Pass, but RGB or Black information in the rest of the passes. I believe even on Multiply where the white information should be removed, the dirt will halo in 32-Bit.

    The only remaining caveat to this method is that you need to make sure you don't use "All Channels" for any material, not even glass or water. All channels will put that material information into all passes and then they will become over bright in the final comp.

    I always save to an EXR format and use the defaults. There is little if any difference between the comp stack and the RGB.

  3. #3
    Senior Member
    Join Date
    Mar 2013
    Location
    Oslo
    Posts
    468

    Name
    Nicolai Bongard
    Forum Username
    nicolaibongard

    Norway

    Default Re: White outline of objects (halo) after combining Vray render elements in PS

    Regarding the compositing of passes with exr files; On Grant Warwicks twitch channel there are some free streams in the archives, and in one of the episodes where they are working on a car there are some good tips and tricks for working with separate passes as exr`s in photoshop, you may want to check those out.

Closed Thread

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

     

Similar Threads

  1. Replies: 0
    Last Post: December 15th, 2016, 02:01 AM
  2. After Effects: Black Halo After Precomping Render Elements
    By alexxrust in forum Post Production Software
    Replies: 3
    Last Post: August 30th, 2013, 09:21 AM
  3. Alpha white matte / halo / fringe / outline
    By johnharrison in forum 3ds Max
    Replies: 12
    Last Post: April 18th, 2013, 10:57 AM
  4. Replies: 21
    Last Post: November 23rd, 2012, 02:22 AM
  5. render elements behind transparent objects
    By ELEVATION in forum Other Renderers
    Replies: 3
    Last Post: October 5th, 2011, 07:32 PM

Posting Permissions

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