"attempt" to produce scanline exr

[vance3d]

the latest sp indicates the following:

When writing a raw .exr file, V-Ray will attempt to produce a scanline version of the file instead of tiled one

in what cases will vray fail at saving a scanline exr and are there any downsides to trying to get vray to save a scanline exr in terms of ram usage?

V Miller

[vlado]

It will fail if you turn off the "use memory frame buffer" option for sure. Otherwise, at the end of the rendering, V-Ray will take the memory buffer, write out a second scanline .exr file, delete the original tiled file, and then rename the scanline file to the original name. To be honest I have not measured how much memory the scanline conversion takes beyond the obvious amount needed for the memory frame buffer.

Best regards,
Vlado

[joconnell]

Vlado just as an aside would it be possible to get a few options added in to this similar to the flags in the vrimg2exr command line? As a preference I'd always like ZipS compression and the datawindow turned on for nuke as they make another huge difference to the redraw speed of files - would it be a big deal to add in compression, color depth and datawindow options into the save dialog?

[vance3d]

good to know since as a rule I usually leave the memory frame buffer off as I always believed it sucked up resources. I think the additional options that joconnell mentioned would be a great addition.

V Miller

[vlado]

Vlado just as an aside would it be possible to get a few options added in to this similar to the flags in the vrimg2exr command line? As a preference I'd always like ZipS compression and the datawindow turned on for nuke as they make another huge difference to the redraw speed of files - would it be a big deal to add in compression, color depth and datawindow options into the save dialog?

It's not that difficult. Will make a note for it. BTW there is already an option for the color depth.

Best regards,
Vlado

[vlado]

good to know since as a rule I usually leave the memory frame buffer off as I always believed it sucked up resources.

It does However for the scanline .exr we really need the frame buffer to be in memory.

Best regards,
Vlado