Stereoscopic eye distance issue with image sequence, single frame is ok.

[frank_vanes]

When I render a sequence (whether active time segment, range, or frames) the eye distance changes to something odd after the first frame has rendered. I have eye distance at 65mm. First frame is ok but then the next is way of sync. It's like it two different cameras. Doesn't matter if I start rendering from frame 0, 1, 3, etc. First frame is always ok.

To avoid eye distance issue I have to render 1 frame, let it write output, then press render for next frame. Luckily I only have 6 frames as I am using Yulio with hotspots in a retail store environment. Hoping not to have to babysit rendering

Camera only has x and y keyframes for position in the store. Nothing else is keyframed.

V-Ray GPU 6 Hotfix 2, CUDA, cpu + gpu, 3ds Max 2021, using distributed rendering.

Camera settings:
Type: spherical camera
Override FOV 360
Vertical FOV 180

Stereoscopic rendering:
Left/Right, Top-bottom, Eye Distance 65mm, Focus method: shear.

Has anyone experienced this issue?

Thanks in advance!

[hermit.crab]

Thanks for the report. The issue is reproducible; I've logged it (internal bug-tracker id: VGPU-5967) for developer investigation. You can use this little script to help you out for now, which basically automates the single frame method:

fn AutoSingleFrameAnim=
(
startFrame = 0
endFrame = 6
for i = startFrame to endFrame do
(
slidertime = i
max quick render
)
)
try(AutoSingleFrameAnim())catch()​

Just set the start and end frames and run.

[frank_vanes]

Hi Aleksandar,

Thanks for the quick response. I was able to kick of the renders with your script. Unfortunately the error still occurs after the first frame is done rendering.

edit: if it helps.. with the script the top camera was misaligned in the 2nd render. Usually the top camera is fine and the bottom was misaligned.

[hermit.crab]

I'm getting identical results with the script and the manual single frame rendering of the sequence. Could you send screencaps (or a scene) of what's happening on your end?