nivvu Posted October 17, 2007 Share Posted October 17, 2007 hi all..... after having a 1 year of experience in vray.....now iam encountering a simple problem as attached in the jpeg. its a simple plane and teapot on it..... and settings are as in the images..only basic settings...... and when i render the image the bottom part of the image is liting up as shown in the image... wat could b the problem????? i have given a trial on settings like environment and other settings too.... but no use....everytime i render i get the same image.... its even happening with interior images also....where the celieng and floor meets with the walls...... please advice to get rid of this problem...... cheers nivas Link to comment Share on other sites More sharing options...
Thablanch Posted October 17, 2007 Share Posted October 17, 2007 I do not know if you are working on Viz or Max, but if it is Viz, make sure to turn off the exposure in the environment panel, as well as radiosity, last rollout at the right in the rendering panel. When you are not using Vray environment, it is simply using Max one, so your environment really matters, whatever the one you use. Your default light is turned off, so I guess you do have a light in there (or else it would be black...) Turn that light off, and work a little with the Vray environment, you will get some results to start with. Hope it helps Link to comment Share on other sites More sharing options...
nivvu Posted October 17, 2007 Author Share Posted October 17, 2007 hi thablanch....... thnks for the lines...... iam using 3dsmax 8 as u c in the attached jpeg's Link to comment Share on other sites More sharing options...
nivvu Posted October 17, 2007 Author Share Posted October 17, 2007 i have done as u said..........but no use......stil the bottom is burning........ Link to comment Share on other sites More sharing options...
MasterZap Posted October 17, 2007 Share Posted October 17, 2007 Wild guess; is your bottom a plane? Make it a box. Probably bleed of irradiance from the other side of the plane. /Z Link to comment Share on other sites More sharing options...
Craig Ramsay Posted October 18, 2007 Share Posted October 18, 2007 Hmmm I tried to reproduce your scene with the same settings but I dont get that problem. If you want to upload the file I can take a quick look at it for you. Link to comment Share on other sites More sharing options...
nivvu Posted October 18, 2007 Author Share Posted October 18, 2007 hi Craig and andersson.... thanks for the lines......as to my surprise as andersson said the bottom is not burning now if i replace the plane with a box or a rectangle extruded....... but y this is happening?????? bcoz even plane is also a 3d object in max.....then y teapot is burning????.......eemmmmm.......does anyone of u know???? thanks a lot for the replies.... this forum has been helping me very much..... cheers nivas Link to comment Share on other sites More sharing options...
MasterZap Posted October 18, 2007 Share Posted October 18, 2007 but y this is happening?????? Because the irradiance cache has stored points on the reverse side of the plane. The down-facing faces on the teapot accidentally includes those points in the interpolation. It's a "misfeature" that could, in principle, occur on mental ray as well, or any other scheme using spatially interpolated pointcloud data. /Z Link to comment Share on other sites More sharing options...
Craig Ramsay Posted October 18, 2007 Share Posted October 18, 2007 Because the irradiance cache has stored points on the reverse side of the plane. The down-facing faces on the teapot accidentally includes those points in the interpolation. It's a "misfeature" that could, in principle, occur on mental ray as well, or any other scheme using spatially interpolated pointcloud data. /Z I understand what you're saying but if that was the issue then how come it didn't happen in my scene? That's not a box under the teapot in my render it's just a plane. Link to comment Share on other sites More sharing options...
dagor Posted October 18, 2007 Share Posted October 18, 2007 sometime vray is critical for flat geomtry and sometimes he is not. i`ll always give thickness (especially room wall, ceiling floor) to all my object except curtain, tulle or other object with Double sided material. intersection teapot with flat plane and low irmap setting- increas you chance to see this effect. Link to comment Share on other sites More sharing options...
nivvu Posted October 19, 2007 Author Share Posted October 19, 2007 good to c these line but.....few days back b4 posting this thread to site i was working on a interior view.....as normal i have modeled the walls floor and ceiling and none of them were touching with each other..... after doing this kind of modeling..places where the walls meeting the ceiling and floor were burning .........in this case the floor and the ceiling were not planes......they were boxes.......i couldn't save those images to post here..... today if i do the same thing..........now its not burning........its taking for a toss as danil said.......but if this burning happens regularly then what to do....??? if thrz a deadline then what to do...?? any solutions...... cheers nivas i just said those lines above 15mins back and now i wil show u the image of a interior project which i have jst started today......now each and everything in this model are boxes and rectangles extruded......now wat to do...??? please go through the image once...... cheers nivas Link to comment Share on other sites More sharing options...
bmcgonigle Posted October 19, 2007 Share Posted October 19, 2007 I do not know if you are working on Viz or Max, but if it is Viz, make sure to turn off the exposure in the environment panel, as well as radiosity, last rollout at the right in the rendering panel. When you are not using Vray environment, it is simply using Max one, so your environment really matters, whatever the one you use. Hope it helps Wow! It really pays to read threads even if they don't relate to anything your working on at the time. Thanks for this nugget of knowledge! I made the noted changes and my scene went from being washed out and flat to having life and depth! Link to comment Share on other sites More sharing options...
dagor Posted October 19, 2007 Share Posted October 19, 2007 hmm. it`s not big problem right now. when you fill interior with furniture and another object you overbright line go out. (it would not be seeng). also higher GI settings help to solve this problem. i always keep my room in one object. i weld wall`s ceiling`s floor`s points. it is not necessary, but i shure in 100% that i`ll never have bug or problem with overbright. (check 1.zip file) also i know that my friend don`t weld points and model room from different boxes, thay have not troubles to... Link to comment Share on other sites More sharing options...
kippu Posted October 19, 2007 Share Posted October 19, 2007 sometimes when the plane is singlefaced or a box with zero thickness then environment light seeps in ....so it is always advisable to give some thickness to your modelled objects Link to comment Share on other sites More sharing options...
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