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Thread: Vray lights issue

  1. #1
    Junior Member Totinguis's Avatar
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    Vray lights issue

    Hi all,

    Since this is the first time I post here I would like to say this site is a truly source of inspiration to me; as I am a newbe on CG, sometimes I get frustrated when I can't get on the image what I have in my mind but when I see your works people they really inspire me and so I start over again. And of course thanks to the kindness of the masters like pawel who take the time to make tutorials and let us see how they do their art so we can learn.

    Now, I have a problem illuminating an exterior scene. I have light leaks everywhere and I can't get rid of them. I tried almost everything (everything I now of couse), search the internet, read tutorials, manuals and I can't solve the problem. I tried many different setting for the irradiance map and light cache, tried the check samples visibility option but I am unable to get a good image quality. Tried different light setting, played around with the camera, check the geomtry, remodeled. I don't now what to do now. Here I show one wip for daylight and another for evening.
    By the way, there is no intersecting or overlapping geometry, no thin geometry and and all the walls and slabs have thickness




    Thanks in advance
    best regards

  2. #2
    Please post some bigger images. Please check if the polygons do not intersect. In the day shot try the light direction place from right side of camera. Placing light behind camera is very difficult and in most cases makes the image pretty flat. Keep it up.

  3. #3
    Junior Member Totinguis's Avatar
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    Sorry for image size
    http://imageshack.us/photo/my-images/231/25454673.jpg/

    I have checked for intersecting polygons. I have re modeled geometry but still getting the same problem. Merged entire scene on a new file just in case the original was corrupted but didn't solve the problem.
    I made a little test trying to reproduce the same conditions on a brand new scene with clean a simple geometry and I keep getting these light leaks.
    I have managed to reduce this problem by tweaking the irradiance map and even though I could achieve better results rendering times were extremely high.
    By the way, this is the first time it happens. I thought it could be a sort of windows problem since my computer wasn't working well. Now a have a new windows installation and of course max and vray.
    I'm using max 2012 64 bit and vray 2.10.01

  4. #4
    Another thing to check is the normals in your geometry, i have had weird things like this when the normals are facing the wrong direction.
    I would also look into double checking that the v-ray light planes don't intersect the geometry.

  5. #5
    Junior Member Maajid's Avatar
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    theres one way it will surely work...go to "f10" go to "settings" tab and in v-ray DMC sampler make Min samples: 16 from 8 and Global subdivs multiplier: 2.0 from 1.0 and a little bit down in you will see "v-ray system". in that section you will get "Render region division" make x: 32 from 64

    and go for render i hope it will work... coz it works for me

  6. #6
    Junior Member mahi's Avatar
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    Hey guys, we have a new tutorial up and running! It's an in depth explanation of how to turn a basic 3D base render into a very interesting image just using Photoshop. Next to that we're giving away all the project files to our facebook fans exclusively.

    Prep4sure.com Lean-Six-Sigma green Belt Exam Course
    Last edited by mahi; 01-20-2016 at 06:10 AM.

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