# Vray camera is broken when rendering through Backburner (VrayRT) **URL:** \ **Category:** Issues\ **Created:** [August 24, 2014, 9:30pm UTC](https://forums.chaos.com/t/vray-camera-is-broken-when-rendering-through-backburner-vrayrt/50835 "2014-08-24T21:30:48Z")\ **Posts on this page:** 18\ **Page:** 1
**Author:** ![peteristrate](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/peteristrate/32/38307_2.png) [@peteristrate](https://forums.chaos.com/u/peteristrate)\ **Post date:** [August 24, 2014, 9:30pm UTC](https://forums.chaos.com/t/vray-camera-is-broken-when-rendering-through-backburner-vrayrt/50835/1 "2014-08-24T21:30:48Z")
Hi, I’m using VrayRT 3.00.07 and Max 2015 sp2. When you render in Max with Vray-Camera, everything is fine. When you submit the scene to Backburner, the vrayCamera renders as zoomed in or out. And there’s no way I can match them. If I use the normal Max Camera, it renders fine both in Max and Backburner. But the Max Camera is useless with Vray as there are no exposure controls. This is definitely a bug. In the past 3 weeks I have discovered several bugs… so if I am to buy Vray(i’m on the trial version now), do i have to buy it with those bugs ? (rethorical question) Thank you. Regards, Peter Istrate. ![rendered with backburner.jpg](https://europe1.discourse-cdn.com/chaosprd/original/3X/0/9/098625d639e19da595421231226b76058b5f231c.jpeg) ![rendered in max.jpg](https://europe1.discourse-cdn.com/chaosprd/original/2X/2/2f88a27e22aac093976b41b34446cb8103ae720e.jpeg) ---
**Author:** ![Dariusz\_Makowski\_Dadal](https://avatars.discourse-cdn.com/v4/letter/d/c4cdca/32.png) [@Dariusz\_Makowski\_Dadal](https://forums.chaos.com/u/Dariusz_Makowski_Dadal)\ **Post date:** [August 24, 2014, 9:54pm UTC](https://forums.chaos.com/t/vray-camera-is-broken-when-rendering-through-backburner-vrayrt/50835/2 "2014-08-24T21:54:45Z")
> [@irridescent Vray material](https://forums.chaos.com/t/irridescent-vray-material/23049/5): > > Hi, > > I’m using VrayRT 3.00.07 and Max 2015 sp2. > > When you render in Max with Vray-Camera, everything is fine. > > When you submit the scene to Backburner, the vrayCamera renders as zoomed in or out. And there’s no way I can match them. > > If I use the normal Max Camera, it renders fine both in Max and Backburner. > But the Max Camera is useless with Vray as there are no exposure controls. > > This is definitely a bug. > In the past 3 weeks I have discovered several bugs… so if I am to buy Vray(i’m on the trial version now), do i have to buy it with those bugs ? (rethorical question) > Thank you. > > Regards, > Peter Istrate. Doest standard max camera works fine? ---
**Author:** ![peteristrate](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/peteristrate/32/38307_2.png) [@peteristrate](https://forums.chaos.com/u/peteristrate)\ **Post date:** [August 24, 2014, 9:57pm UTC](https://forums.chaos.com/t/vray-camera-is-broken-when-rendering-through-backburner-vrayrt/50835/3 "2014-08-24T21:57:40Z")
Hi Dariusz, Yes, the standard Max camera works fine. I’ve stated that already, read again 😛 ---
**Author:** ![Dariusz\_Makowski\_Dadal](https://avatars.discourse-cdn.com/v4/letter/d/c4cdca/32.png) [@Dariusz\_Makowski\_Dadal](https://forums.chaos.com/u/Dariusz_Makowski_Dadal)\ **Post date:** [August 24, 2014, 10:38pm UTC](https://forums.chaos.com/t/vray-camera-is-broken-when-rendering-through-backburner-vrayrt/50835/4 "2014-08-24T22:38:12Z")
Aw sory, blindness has me… Humh that’s strange in this case 😛 ---
**Author:** ![tashko.zashev](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/tashko.zashev/32/275280_2.png) [@tashko.zashev](https://forums.chaos.com/u/tashko.zashev)\ **Post date:** [August 25, 2014, 8:25am UTC](https://forums.chaos.com/t/vray-camera-is-broken-when-rendering-through-backburner-vrayrt/50835/5 "2014-08-25T08:25:58Z")
Hi Peter, Yes, there is a bug. The case is already logged to our system and we will fix it. Thank you for sharing your experience. ![2014-08-25 11_31_12.jpg](https://europe1.discourse-cdn.com/chaosprd/original/3X/8/7/877ba0eef71e84cb7254a8bef075054cdfa59489.jpeg) ---
**Author:** ![peteristrate](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/peteristrate/32/38307_2.png) [@peteristrate](https://forums.chaos.com/u/peteristrate)\ **Post date:** [August 25, 2014, 4:05pm UTC](https://forums.chaos.com/t/vray-camera-is-broken-when-rendering-through-backburner-vrayrt/50835/6 "2014-08-25T16:05:53Z")
Cool. For now I have worked it around with Batch rendering because I have several cameras in one scene(out of several other scenes), but when you have multiple scenes, Backburner is needed. Looking forward to see it fixed in the next build. Thanks. ---
**Author:** ![tashko.zashev](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/tashko.zashev/32/275280_2.png) [@tashko.zashev](https://forums.chaos.com/u/tashko.zashev)\ **Post date:** [August 26, 2014, 6:30am UTC](https://forums.chaos.com/t/vray-camera-is-broken-when-rendering-through-backburner-vrayrt/50835/7 "2014-08-26T06:30:30Z")
Thanks for your update Peter. Our developers are working on the fix right now, so we will notify you on any update. ---
**Author:** ![peteristrate](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/peteristrate/32/38307_2.png) [@peteristrate](https://forums.chaos.com/u/peteristrate)\ **Post date:** [August 26, 2014, 5:56pm UTC](https://forums.chaos.com/t/vray-camera-is-broken-when-rendering-through-backburner-vrayrt/50835/8 "2014-08-26T17:56:20Z")
I have also noticed that if I render through Batch renderer(not Backburner) and I try to save the renders as .hdr, it saves the image as black. If I save the image manually, using the VFB save button, it saves ok, but if it’s saved through Batch rendering, it saves black. Regards, Peter Istrate. ---
**Author:** ![vlado](https://avatars.discourse-cdn.com/v4/letter/v/779978/32.png) [@vlado](https://forums.chaos.com/u/vlado)\ **Post date:** [August 26, 2014, 7:36pm UTC](https://forums.chaos.com/t/vray-camera-is-broken-when-rendering-through-backburner-vrayrt/50835/9 "2014-08-26T19:36:46Z")
Is that only for HDR files? What about OpenEXR? Best regards, Vlado ---
**Author:** ![peteristrate](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/peteristrate/32/38307_2.png) [@peteristrate](https://forums.chaos.com/u/peteristrate)\ **Post date:** [August 27, 2014, 4:54am UTC](https://forums.chaos.com/t/vray-camera-is-broken-when-rendering-through-backburner-vrayrt/50835/10 "2014-08-27T04:54:58Z")
The OpenEXR is fine. The .hdr is not. I haven’t tried other file formats. I think you can replicate this with a very simple scene - just try to render and save with Batch rendering. Regards, Peter Istrate. ---
**Author:** ![tashko.zashev](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/tashko.zashev/32/275280_2.png) [@tashko.zashev](https://forums.chaos.com/u/tashko.zashev)\ **Post date:** [August 27, 2014, 6:56am UTC](https://forums.chaos.com/t/vray-camera-is-broken-when-rendering-through-backburner-vrayrt/50835/11 "2014-08-27T06:56:46Z")
Hi Peter, I can replicate this issue only if I use the native 3DS max save option. Saving from Render settings \> V-Ray frame buffer \> Separate render channels to HDR file works fine in my test. Could you use this as a workaround? ---
**Author:** ![vlado](https://avatars.discourse-cdn.com/v4/letter/v/779978/32.png) [@vlado](https://forums.chaos.com/u/vlado)\ **Post date:** [August 27, 2014, 7:07am UTC](https://forums.chaos.com/t/vray-camera-is-broken-when-rendering-through-backburner-vrayrt/50835/12 "2014-08-27T07:07:17Z")
When you save to HDR, 3ds Max puts up a dialog box asking if you want to use non-clamped (realpixel) color channel, or use standard RGB channel. Which option did you select? The first one will not work. The RT engine also has an option to generate a floating-point image buffer, which you might need to enable. Best regards, Vlado ---
**Author:** ![peteristrate](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/peteristrate/32/38307_2.png) [@peteristrate](https://forums.chaos.com/u/peteristrate)\ **Post date:** [August 27, 2014, 2:35pm UTC](https://forums.chaos.com/t/vray-camera-is-broken-when-rendering-through-backburner-vrayrt/50835/13 "2014-08-27T14:35:02Z")
@Vlado: The floating point buffer option(“Use 32 bit frame buffer”?) for the frame buffer is checked. For HDR, i use the non-clamped (realpixel) color channel because I need the whole 32 bit range of the image to alter it in compositing. The standard RGB channel is just an 8bit image if i’m not mistaken. @Tashko: If I use the save “separate render channels” then all my batched renders will have the same path that was set in “separate render channels”. Saving from Render settings \> V-Ray frame buffer \> Separate render channels to HDR file works fine, indeed but then I can’t have different multiple saving paths as Batch rendering allows you to so that’s why i need to save through Batch rendering(which uses the standard max saving option). I could create a different “Scene State” for each of my renders so in that case, each camera will have it’s own scene state with its own render settings(including “Separate render channels”) and then I can assign the corresponding render state in Batch rendering, but this is not feasible at all. ---
**Author:** ![vlado](https://avatars.discourse-cdn.com/v4/letter/v/779978/32.png) [@vlado](https://forums.chaos.com/u/vlado)\ **Post date:** [August 28, 2014, 7:28am UTC](https://forums.chaos.com/t/vray-camera-is-broken-when-rendering-through-backburner-vrayrt/50835/14 "2014-08-28T07:28:25Z")
> [@Texturing Vray Fur](https://forums.chaos.com/t/texturing-vray-fur/45537/8): > > For HDR, i use the non-clamped (realpixel) color channel because I need the whole 32 bit range of the image to alter it in compositing. The standard RGB channel is just an 8bit image if i’m not mistaken. The realpixel channel option will not work. Use the other one - it works just fine and will produce proper HDR data. Best regards, Vlado ---
**Author:** ![peteristrate](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/peteristrate/32/38307_2.png) [@peteristrate](https://forums.chaos.com/u/peteristrate)\ **Post date:** [August 28, 2014, 11:25pm UTC](https://forums.chaos.com/t/vray-camera-is-broken-when-rendering-through-backburner-vrayrt/50835/15 "2014-08-28T23:25:28Z")
I was rendering today with Batch rendering as a workaround for Backburner and I have noticed the cropping(or zoom factor) occurs with Batch rendering as well this time. I had 2 batch render entries(2 cameras): the first one rendered correctly, the second one rendered cropped/zoomed. But it worked fine for other scenes before. That is very strange. ---
**Author:** ![tashko.zashev](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/tashko.zashev/32/275280_2.png) [@tashko.zashev](https://forums.chaos.com/u/tashko.zashev)\ **Post date:** [August 29, 2014, 7:56am UTC](https://forums.chaos.com/t/vray-camera-is-broken-when-rendering-through-backburner-vrayrt/50835/16 "2014-08-29T07:56:15Z")
Hi, Can’t reproduce it in my tests with simple setup with two V-Ray physical cameras. Would it be possible to send us your scene file or a simplified version of it? Probably only cameras and a box. ---
**Author:** ![peteristrate](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/peteristrate/32/38307_2.png) [@peteristrate](https://forums.chaos.com/u/peteristrate)\ **Post date:** [September 9, 2014, 2:12am UTC](https://forums.chaos.com/t/vray-camera-is-broken-when-rendering-through-backburner-vrayrt/50835/17 "2014-09-09T02:12:30Z")
The scene has been sent to Vlado so I suppose you guys are aware of it now. Unfortunately, Batch rendering was not a work around to Backburner after all, because Batch rendering uses **Scene States** (you can selects which scene state to be used in a certain Batch rendering render), while I need to make use of the **State Sets** which can not be used in Batch rendering but only if I submit the scene(each state set) to Backburner. ---
**Author:** ![tashko.zashev](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/tashko.zashev/32/275280_2.png) [@tashko.zashev](https://forums.chaos.com/u/tashko.zashev)\ **Post date:** [September 15, 2014, 11:45am UTC](https://forums.chaos.com/t/vray-camera-is-broken-when-rendering-through-backburner-vrayrt/50835/18 "2014-09-15T11:45:50Z")
Hi Peter, We would like to inform you that our developers have made some improvements to the latest nightly builds and the discrepancy between the V-ray adv. and RT camera filed of view should be solved. Please let me know if any issues arise again.