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Image Bleached due to Material Change?

Scheduled Pinned Locked Moved V-Ray
renderpluginsextensions
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  • N Offline
    n3v
    last edited by 9 May 2012, 16:47

    Hi Guys

    Unfortunately I can't attach an image due to the nature of the work but I have a model and scene that has been rendering perfectly fine until today, I've tweaked a few materials (updated a few jpeg materials and added an emissive material) now when I click render the whole image is bleached, including the sky which is now white, I've tried loading lots of different kinds of visopts but the results still the same, what gone wrong? I'm guessing something within a material because this is the only thing I have changed and as I mentioned different visopt's are yielding the same results

    Oh also I've opened an older version of the same model and this is fine so I can't work out whats ruined it?

    few additional points...

    GI and BG are set to the sunlight plugin with default settings

    physical camera is on and set to more or less defaults

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    • A Offline
      andybot
      last edited by 9 May 2012, 19:09

      can you do a test scene with just the problem material?

      http://charlottesvillearchitecturalrendering.com/

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      • N Offline
        n3v
        last edited by 9 May 2012, 19:32

        Hi Andy bot,

        I'm not 100% it is a material, I've got no idea really but I've loaded and reloaded various visopt's with the same results, I think I'm just going to revert to an older archived model but it would be nice to find out what the cause is.

        I remember in another model it was fine and then I brought in a material from the vray standards a chrome I think and for some reason it ruined all the glass in the scene, in the end I had to use a different material and I have a suspicion the same thing has happened here.

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        • H Offline
          holmes1977
          last edited by 10 May 2012, 08:48

          Have never come across that problem before. This is probably a question you should put to the developers @ chaos group http://www.chaosgroup.com/forums/vbulletin/forumdisplay.php?126-V-Ray-for-SketchUp

          Exaggeration makes a dull story better.

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          • V Offline
            valerostudio
            last edited by 10 May 2012, 13:29

            Sounds like something is overexposing your render. Turn off all lights, remove the emissive material and set the options to default and try to render. If its still bleached out, I would copy and paste the whole thing into a new file. You will lose all of your material settings but sometimes if there is a problem and you cant figure it out you have to start from scratch.

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            • N Offline
              n3v
              last edited by 10 May 2012, 19:25

              Hi guys thanks for the advice, I removed the emissive materials, loaded multiple different visopt settings and got the same result, I've accepted that that model is not recoverable so I copied and pasted it into the archived model which initially gave me problems because the DR spawner couldnt find the materials, I ended up packaging them and reimporting them and restarting the sortware and its working fine now.

              just for the record I've attached a small sample, the top left hand corner should be sky whilst the rest is a timber rainscreen fixed back to a dark material. It does look over exposed but what was causing it I dont know, I'm not a pro by any means with Vray and I know the smallest tick box can have the greatest effect, one thing that could be responsible is that I followed the settings for having environmental light whilst retaining sketchup sun shadows using the reflection glitch, although all the settings were returned to normal, I have a feeling it might have had something to do with that


              Bleached image sample

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              • V Offline
                valerostudio
                last edited by 11 May 2012, 13:10

                Dont load VISOPTS - if you are using a different version than the vispot was created with, you will have a lot of issues. There were major changes in the 1.05 to 1.49 versions. Just click the reset defaults on the options panel and try that. I think its the visopts that are your issue.

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                • N Offline
                  n3v
                  last edited by 12 May 2012, 09:38

                  @valerostudio said:

                  Dont load VISOPTS - if you are using a different version than the vispot was created with, you will have a lot of issues. There were major changes in the 1.05 to 1.49 versions. Just click the reset defaults on the options panel and try that. I think its the visopts that are your issue.

                  Valero Point taken, a few of my renders were running (ie going through the motions) but not actually doing the rendering, then when setting up the scene manually with exact same settings it was running fine, seems like vray is actually quite buggy and we're really at the front end of it as a piece of software

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