Vray camera is broken when rendering through Backburner (VrayRT)

[peteristrate]

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.

[Dariusz Makowski (Dadal)]

Hi,

I'm using VrayRT 3.00.07 and Max 2015 sp2.

When you render in Max with Vray-Camera, everything is fine.
[ATTACH=CONFIG]20622[/ATTACH]

When you submit the scene to Backburner, the vrayCamera renders as zoomed in or out. And there's no way I can match them.
[ATTACH=CONFIG]20621[/ATTACH]

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?

[peteristrate]

Hi Dariusz,

Yes, the standard Max camera works fine. I've stated that already, read again

[Dariusz Makowski (Dadal)]

Aw sory, blindness has me... Humh that's strange in this case

[tashko.zashev]

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.

[peteristrate]

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.

[tashko.zashev]

Thanks for your update Peter.
Our developers are working on the fix right now, so we will notify you on any update.

[peteristrate]

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.

[vlado]

Is that only for HDR files? What about OpenEXR?

Best regards,
Vlado

[peteristrate]

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.

[tashko.zashev]

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?

[vlado]

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

[peteristrate]

@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.

[vlado]

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

[peteristrate]

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.