# Using projection node with vray **URL:** \ **Category:** Issues\ **Created:** [November 27, 2013, 7:03am UTC](https://forums.chaos.com/t/using-projection-node-with-vray/47901 "2013-11-27T07:03:02Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![joa\_grilo](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/joa_grilo/32/9577_2.png) [@joa\_grilo](https://forums.chaos.com/u/joa_grilo)\ **Post date:** [November 27, 2013, 7:03am UTC](https://forums.chaos.com/t/using-projection-node-with-vray/47901/1 "2013-11-27T07:03:02Z")
Hi, I’m using a file projection texture to make camera projection and everything looks correct when using Maya software render , and even mental ray, but when a use v-ray i get a position and size shift, and its related to the output size of the render( and its should be independent ) I’m i doing something wrong or is it a bug? Scene Shader network Vray render Maya render ![Screen Shot 2013-11-27 at 5.48.44 PM.png](https://europe1.discourse-cdn.com/chaosprd/original/3X/b/1/b1fca88934f29af0441377df6c9f1e4f368ab292.png) ![Screen Shot 2013-11-27 at 5.53.45 PM.png](https://europe1.discourse-cdn.com/chaosprd/original/3X/a/6/a65b6c090a7337da5bf81d5e2c895ddd89021f57.png) ![Screen Shot 2013-11-27 at 5.53.56 PM.jpg](https://europe1.discourse-cdn.com/chaosprd/original/2X/8/8734e491f42ae364146c3d8fd020bbdb024c2262.jpeg) ![Screen Shot 2013-11-27 at 5.54.07 PM.png](https://europe1.discourse-cdn.com/chaosprd/original/3X/a/3/a348177f2c9a84572acfcafb37b993f44e92af1e.png) ---
**Author:** ![yolov](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/yolov/32/11920_2.png) [@yolov](https://forums.chaos.com/u/yolov)\ **Post date:** [November 27, 2013, 10:11am UTC](https://forums.chaos.com/t/using-projection-node-with-vray/47901/2 "2013-11-27T10:11:03Z")
Hi Joao, What VRay version are you using? ---
**Author:** ![Yannick](https://avatars.discourse-cdn.com/v4/letter/y/b782af/32.png) [@Yannick](https://forums.chaos.com/u/Yannick)\ **Post date:** [November 27, 2013, 11:53am UTC](https://forums.chaos.com/t/using-projection-node-with-vray/47901/3 "2013-11-27T11:53:39Z")
Hi Jao, you can also use the Vray Place Env Tex node plug that to your image. Then use the screen mode. That does the same as you trying to achieve. You can also plug your image in the background, this create the Vray Place Env Tex node and use the screen mode again. Yannick ---
**Author:** ![joa\_grilo](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/joa_grilo/32/9577_2.png) [@joa\_grilo](https://forums.chaos.com/u/joa_grilo)\ **Post date:** [November 27, 2013, 10:23pm UTC](https://forums.chaos.com/t/using-projection-node-with-vray/47901/4 "2013-11-27T22:23:51Z")
I’m using 2.30.02. Thanks ---
**Author:** ![joa\_grilo](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/joa_grilo/32/9577_2.png) [@joa\_grilo](https://forums.chaos.com/u/joa_grilo)\ **Post date:** [November 28, 2013, 12:10am UTC](https://forums.chaos.com/t/using-projection-node-with-vray/47901/5 "2013-11-28T00:10:45Z")
Got it to works in this way, with the help of Yannick Thanks ![Screen Shot 2013-11-28 at 11.09.50 AM.png](https://europe1.discourse-cdn.com/chaosprd/original/3X/1/c/1c7bc1a8fa6a846489712d90ad8591004936038b.png) ---
**Author:** ![joa\_grilo](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/joa_grilo/32/9577_2.png) [@joa\_grilo](https://forums.chaos.com/u/joa_grilo)\ **Post date:** [November 28, 2013, 12:17am UTC](https://forums.chaos.com/t/using-projection-node-with-vray/47901/6 "2013-11-28T00:17:52Z")
I still would like to use the maya projection node in v-ray, is that possible? Mainly because i would like to use different cameras as uv coordinates for maps. Thanks ---
**Author:** ![yolov](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/yolov/32/11920_2.png) [@yolov](https://forums.chaos.com/u/yolov)\ **Post date:** [November 28, 2013, 2:15pm UTC](https://forums.chaos.com/t/using-projection-node-with-vray/47901/7 "2013-11-28T14:15:58Z")
Sorry for the late reply. This should be working in VRay. I’m not sure if there were some improvements to the camera projections that we added later. Can we take a look at your scene? I’m interested in seeing your settings for camera/placement nodes/projection nodes. ---
**Author:** ![Fredrik\_Averpil](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/fredrik_averpil/32/35925_2.png) [@Fredrik\_Averpil](https://forums.chaos.com/u/Fredrik_Averpil)\ **Post date:** [November 28, 2013, 3:32pm UTC](https://forums.chaos.com/t/using-projection-node-with-vray/47901/8 "2013-11-28T15:32:05Z")
I use projections like that all the time, without any issues. What strikes me is that you don’t seem to have a camera hooked up to the projection node, judging by your first screenshot. Try setting the projection type to “perspective” and then link a camera to the projection node (if you haven’t already). ---
**Author:** ![Yannick](https://avatars.discourse-cdn.com/v4/letter/y/b782af/32.png) [@Yannick](https://forums.chaos.com/u/Yannick)\ **Post date:** [November 28, 2013, 4:28pm UTC](https://forums.chaos.com/t/using-projection-node-with-vray/47901/9 "2013-11-28T16:28:18Z")
By default the camera projection with the Maya texture projection, works for me. But as soon as you plan with Film offset, overscan… that when it stops working properly for me. Yannick ---
**Author:** ![EJohn](https://avatars.discourse-cdn.com/v4/letter/e/6a8cbe/32.png) [@EJohn](https://forums.chaos.com/u/EJohn)\ **Post date:** [November 28, 2013, 5:11pm UTC](https://forums.chaos.com/t/using-projection-node-with-vray/47901/10 "2013-11-28T17:11:08Z")
If you’re just using film offset you can compensate by adjusting the U and V offsets of the 2d placement node attached to whatever you are projecting. You can work out the value needed by finding the film offset in each axis as a percentage of the camera aperture dimensions (both are measured in the same unit, inches I think, by default) Eliott ---
**Author:** ![t.petrov](https://avatars.discourse-cdn.com/v4/letter/t/c68b51/32.png) [@t.petrov](https://forums.chaos.com/u/t.petrov)\ **Post date:** [November 28, 2013, 5:49pm UTC](https://forums.chaos.com/t/using-projection-node-with-vray/47901/11 "2013-11-28T17:49:29Z")
> [@V-Ray Light](https://forums.chaos.com/t/v-ray-light/43489/8): > > By default the camera projection with the Maya texture projection, works for me. But as soon as you plan with Film offset, overscan… that when it stops working properly for me. Do you know if Maya software or Mental Ray render the image correctly in this case? If they do we then have a bug, which we should fix. ---
**Author:** ![joa\_grilo](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/joa_grilo/32/9577_2.png) [@joa\_grilo](https://forums.chaos.com/u/joa_grilo)\ **Post date:** [November 28, 2013, 10:35pm UTC](https://forums.chaos.com/t/using-projection-node-with-vray/47901/12 "2013-11-28T22:35:01Z")
Sending you can check by just changing render engine to see the difference . Thanks [projection\_error.zip](https://forums.chaos.com/uploads/short-url/zeibtPfl4SHF0jwFENInbUcbLcw.zip) (94.6 KB) ---
**Author:** ![joa\_grilo](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/joa_grilo/32/9577_2.png) [@joa\_grilo](https://forums.chaos.com/u/joa_grilo)\ **Post date:** [November 28, 2013, 10:36pm UTC](https://forums.chaos.com/t/using-projection-node-with-vray/47901/13 "2013-11-28T22:36:39Z")
> [@Phoenix for maya questions on large scale scenes and distributed sims](https://forums.chaos.com/t/phoenix-for-maya-questions-on-large-scale-scenes-and-distributed-sims/43349/8): > > Do you know if Maya software or Mental Ray render the image correctly in this case? > If they do we then have a bug, which we should fix. it works ok in maya render and in mental ray ---
**Author:** ![joa\_grilo](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/joa_grilo/32/9577_2.png) [@joa\_grilo](https://forums.chaos.com/u/joa_grilo)\ **Post date:** [November 28, 2013, 10:39pm UTC](https://forums.chaos.com/t/using-projection-node-with-vray/47901/14 "2013-11-28T22:39:16Z")
> [@ivaylo.ivanov](#): > > I use projections like that all the time, without any issues. What strikes me is that you don’t seem to have a camera hooked up to the projection node, judging by your first screenshot. Try setting the projection type to “perspective” and then link a camera to the projection node (if you haven’t already). I’m using this way . ![Screen Shot 2013-11-29 at 9.38.17 AM.png](https://europe1.discourse-cdn.com/chaosprd/original/3X/8/0/8017cd77c709a32492bb9486da346b6eb3765390.png) ---
**Author:** ![yolov](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/yolov/32/11920_2.png) [@yolov](https://forums.chaos.com/u/yolov)\ **Post date:** [November 29, 2013, 12:14pm UTC](https://forums.chaos.com/t/using-projection-node-with-vray/47901/15 "2013-11-29T12:14:01Z")
Hi Joao, Thanks for the scene, I got to look at it. This is actually a bug and we have fixed it for 2.4, which you can download from our website. The fix is also available in the nightly builds. The problem was that VRay wouldn’t render correctly when the projection fit type was set to “Match camera film gate”. ---
**Author:** ![Yannick](https://avatars.discourse-cdn.com/v4/letter/y/b782af/32.png) [@Yannick](https://forums.chaos.com/u/Yannick)\ **Post date:** [November 29, 2013, 4:54pm UTC](https://forums.chaos.com/t/using-projection-node-with-vray/47901/16 "2013-11-29T16:54:33Z")
> [@shirt store](https://forums.chaos.com/t/shirt-store/43518/4): > > Hi Joao, > > Thanks for the scene, I got to look at it. This is actually a bug and we have fixed it for 2.4, which you can download from our website. The fix is also available in the nightly builds. The problem was that VRay wouldn’t render correctly when the projection fit type was set to “Match camera film gate”. Cool good to know. Cheers. ---
**Author:** ![joa\_grilo](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/joa_grilo/32/9577_2.png) [@joa\_grilo](https://forums.chaos.com/u/joa_grilo)\ **Post date:** [December 1, 2013, 10:14pm UTC](https://forums.chaos.com/t/using-projection-node-with-vray/47901/17 "2013-12-01T22:14:31Z")
Thanks! By the way, where can i download the _nightly builds ?_ ---
**Author:** ![yolov](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/yolov/32/11920_2.png) [@yolov](https://forums.chaos.com/u/yolov)\ **Post date:** [December 2, 2013, 6:23am UTC](https://forums.chaos.com/t/using-projection-node-with-vray/47901/18 "2013-12-02T06:23:23Z")
You can contact our [support@chaosgroup.com](mailto:support@chaosgroup.com) to arrange access to the nightly builds. ---
**Author:** ![pipe\_mm](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/pipe_mm/32/65538_2.png) [@pipe\_mm](https://forums.chaos.com/u/pipe_mm)\ **Post date:** [January 3, 2023, 10:20pm UTC](https://forums.chaos.com/t/using-projection-node-with-vray/47901/19 "2023-01-03T22:20:17Z")
found this old thread - seems still to be an issue. projection does work fine in maya software render, but there is a wrong scaling in vray ![Capture6.jpg](https://europe1.discourse-cdn.com/chaosprd/original/2X/f/fcdcacec91674b4935e400d75974f8de27bf40f9.jpeg) ---
**Author:** ![yolov](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/yolov/32/11920_2.png) [@yolov](https://forums.chaos.com/u/yolov)\ **Post date:** [January 5, 2023, 6:54am UTC](https://forums.chaos.com/t/using-projection-node-with-vray/47901/20 "2023-01-05T06:54:35Z")
Not sure if any of the options for fitting the projection need to be tweaked or something else. Can you share a scene ?