Windows 10, GTX 1080 ti
Blender 2.79b f4dc9f9d68b
Hi guys,
When rendering a depth pass in this case for Nuke, and outputting it to a 32bit .exr file, we are getting banding. Check the .blend example.
Is it possible that there is going to be a fix for this soon? Our compositors noted that 16 bit .exr files should be fine with a depth pass.
Thanks,
Beau
Press F12 and see the banding appear, check the values (viewer node) and see the stepped/jumping values.
Are you sure there is banding in the resulting EXR files? Dither in the Post processing panel is set to 0.0 in this file, so when the render is displayed there is banding. But looking at the values in the EXR I couldn't see any banding.
Hi Brecht,
This is what we see when banding is on a value of 2:
This isn't a monitor issue? Are you using the same Blender version?
Thanks :)
One confusing thing is that Blender supports dithering on Render / Viewer node results, but not on loaded EXR images. So those will always show banding, even if the float values are fine.
Did you check the float values when sampling with the mouse, are they really the same within one band? Or is it just a display issue?
They are not the same, but it is gradual within a band but going to the next one it jumps by a value of 0.002. Quite minor but still a banding issue?
So you are also saying that there will always be banding when viewed in Nuke for instance? Or just a loaded .exr image in Blender? Because both Blender and Nuke display the same banding and amount 0.002.
When viewing a gradient like this on an 8bit monitor there will always be banding, unless dithering is applied. Nuke has settings for dithering, I don't know if you have that enabled.
I can't say much about that 0.002 value without knowing what the steps are within the band, but it doesn't seem wrong to me.