Announcement

Collapse
No announcement yet.

Refraction Issues with DomeLight / Abbe

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • Refraction Issues with DomeLight / Abbe

    Hi,

    I am encountering an issue that I don't really understand. In one setup everything works as expected and in the other setup stuff gives me really unexpected results. Maybe someone could clear this up?

    Click image for larger version  Name:	diamondQuestion.jpg Views:	0 Size:	899.5 KB ID:	1077250

    Setup 1-3: (Everything works like expected)
    NO lights are used, just one very large sphere with a VRayLightMtl and a VRayBitmap and coordinate space 3dsMax Standard, so it uses the UV's of the sphere. Environment color set to green.
    1: Sphere is visible to camaera
    2: Sphere is invisible to camera and background shows through
    3: Like 2 but enabled AbbeNumber Checkbox

    Setup 4-6: (Unexpected results for me)
    ONLY ONE VRayDomeLight is used with VRayBitmap and coordinate space set to spherical. Full dome enabled. Environment color set to green.
    4: Light is Visible and affect all diffuse, spec, refl
    5. Light is Invisible and affect all diffuse, spec, refl
    6. Like 5 but enabled AbbeNumber Checkbox

    Questions:
    - Why is the background color mixed into the refraction for 5 but not for 2?
    - Why does everything fall apart completely when enabeling abbe for 6?

    Having the same effects with 3.6 btw.
    The shader is the diamond material from the V-Ray library
    Btw, its a bit annoying that everything always freezes for like 15 seconds when enabling the abbe, it must have something to do with the new preview swatches as this issue doesnt exist in 3.6.

    Best,
    Jonas

    Last edited by JonasNöll; 06-07-2020, 01:43 AM.
    Check out my FREE V-Ray Tutorials

  • #2
    Oh yes, I just tried this. It messes with the alpha also.
    https://www.behance.net/bartgelin

    Comment


    • #3
      Ok good to know I'm not alone with this
      Check out my FREE V-Ray Tutorials

      Comment


      • #4
        Thanks for the report. We already have a similar issue logged (internal bug-tracker id: VMAX-1981). I'll raise the question to our developers for further investigation.
        Aleksandar Hadzhiev | chaos.com
        Chaos Support Representative | contact us

        Comment


        • #5
          Hi, can you point me to where I can find the logged bugs? I would like to compare what is logged in the bug you were describing.
          Also as the issue already exists since 3.6 it was never adressed so far?
          Check out my FREE V-Ray Tutorials

          Comment


          • #6
            Originally posted by JonasNöll View Post
            Hi, can you point me to where I can find the logged bugs? I would like to compare what is logged in the bug you were describing.
            Bug tracking is private.
            Also as the issue already exists since 3.6 it was never adressed so far?
            They are technically called "regressions".
            Lele
            Trouble Stirrer in RnD @ Chaos
            ----------------------
            emanuele.lecchi@chaos.com

            Disclaimer:
            The views and opinions expressed here are my own and do not represent those of Chaos Group, unless otherwise stated.

            Comment


            • #7
              Alright because it was already the second time that I was given some cryptic bug log code, so I thought there would be somewhere where I could check that.
              I would appreciate to know if it is a know bug or if I am doing something wrong or if this behavior is intended for whatever reason. Thx!
              Check out my FREE V-Ray Tutorials

              Comment


              • #8
                They write the bug tracking code here for future reference, so Support can find it later.
                Lele
                Trouble Stirrer in RnD @ Chaos
                ----------------------
                emanuele.lecchi@chaos.com

                Disclaimer:
                The views and opinions expressed here are my own and do not represent those of Chaos Group, unless otherwise stated.

                Comment


                • #9
                  This issue seems to be related. One of the materials also had the Abbe number turned on.
                  https://forums.chaosgroup.com/forum/...active-objects
                  https://www.behance.net/Oliver_Kossatz

                  Comment


                  • #10
                    Originally posted by kosso_olli View Post
                    This issue seems to be related. One of the materials also had the Abbe number turned on.
                    https://forums.chaosgroup.com/forum/...active-objects
                    Hi, so what was for you the fix in this case? Or was it never fixed until now?
                    Check out my FREE V-Ray Tutorials

                    Comment


                    • #11
                      Originally posted by JonasNöll View Post

                      Hi, so what was for you the fix in this case? Or was it never fixed until now?
                      Sadly no fix. Had to render twice.
                      https://www.behance.net/Oliver_Kossatz

                      Comment


                      • #12
                        hermit.crab : Hi, did you get some feedback from the developers, or is the current workaround to not use refractive materials with invisible domelights? It seems a pretty common usecase though
                        Check out my FREE V-Ray Tutorials

                        Comment


                        • #13
                          Hello everybody!
                          I'm not sure if this topic is suitable for my problem, but I decided to write here so as not to do another one.

                          Here's my problem:
                          (Light = Dome HDR)


                          Thank you =)

                          Comment


                          • #14
                            Anybody home?

                            Comment


                            • #15
                              I'm trying to reproduce the setup here.

                              Best regards,
                              Vlado
                              I only act like I know everything, Rogers.

                              Comment

                              Working...
                              X