Messages

1

[Max] I need help! / Re: Distributed Render blur/distortion

« on: 2025-05-16, 13:23:32 »

Can confirm Max 2026 is fine in OCIO

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[Max] I need help! / Re: Distributed Render blur/distortion

« on: 2025-05-16, 08:17:02 »

And one more post... the problem does not occur when I switch to Color Management to Gamma Workflow. Not sure if this might shed some light...

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[Max] I need help! / Re: Distributed Render blur/distortion

« on: 2025-05-16, 07:51:02 »

So while I am waiting to sort out a time for a live session with support I thought I would post a clue which might help jog a thought.

The previous ghosting images are with me using the image into the displacement channel of the material. I tried plugging into base color just to see if the shift happens there and it does not. What does happen is the section that was previously ghosted is darker as per attached images. Could this be something to do with some sort of color/gamma thing? The displacement would look like it has shifted because the bitmap is brighter/darker on different machines. I am using Max 2025 with the standard OCIO Default on both machines so not sure what else to look at...

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[Max] I need help! / Re: Distributed Render blur/distortion

« on: 2025-05-15, 12:08:03 »

No, just a vanilla corona camera

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[Max] I need help! / Re: Distributed Render blur/distortion

« on: 2025-05-14, 23:49:23 »

Hi Tom,

- Since it is the middle third of the image, looks like something to do with sections of the image rendered on one machine vs. another

Yes, it is definitely when the render node completes a sync interval. On the render node I see something like 2025-05-15 07:33:29   Started EXR dump (46,424,108 bytes, filename: C:/Users/Mike Rogers/AppData/Local/CoronaRenderer/DrData/dump9835.exr)

Then a second later the render ghosts. See attached screenshots.

- It looks less like blurriness and more like ghosting, it's as if three or four versions are overlaid each slightly offset

100% correct

- Does changing the synch interval and/or max pixels to transfer at once make any difference? Either resolving it, or changing where it happens in the image? The end render is very large so there could be something to do with the network itself getting overwhelmed with data (what is your network speed btw?)

The network is 2 modern laptops (pro art 16 and legion 9i) direct connected and tested at 1 gigabit. Legion has ethernet port, pro art has 10gb usb-a ethernet dongle.

The ghosting comes across in bands depending on the number of pixels. Fewer pixels = more bands but after a while the entire image is ghosted.

Hi Frood,

Same issue occurs regardless of Corona Bitmap or std bitmap

Thanks,

Mike

6

[Max] I need help! / Re: Distributed Render blur/distortion

« on: 2025-05-14, 13:01:52 »

Thanks Aram,

I have literally stripped the scene back to nothing.... a plane with a material with a png feeding displacement and a camera with environment lighting. And still the issue. Zip attached.

Some more things ... I have identical NVIDIA studio drivers on the two PCs, system unit setup the same. Not sure what else to double check.

Oddly, using a Noise instead of a Corona Bitmap to drive displacement does not cause the issue. When I add CInfo_NetworkRenderDebugging I get blurry results

I don't see how it could be a bug with such a simple scene?

7

[Max] I need help! / Distributed Render blur/distortion

« on: 2025-05-14, 06:52:49 »

So when I render locally all is good. When I use DR I get distorted/blurry regions. These occur when the node synchronizes to the server. I am running same Max (2025.3) and Corona 12 Update 2 on both machines. I have tried the lock/unlock render view trick I read about in another post. Attached are samples of with & without blurriness.

Thanks

8

[Max] I need help! / Re: Compositing with backplate and masking

« on: 2024-07-21, 04:42:21 »

Hi Aram,

So uploaded a scene to test with. Included in the zip file is a file called composite.png which is output from photoshop using the mask mask.png which would work in the vray workflow described above. If you want i can create a scene using vray soln for comparison.

Hi Romullus,

A box with shadow catcher works ok when the geometry is simple but if it's not something simple like a pillar (eg: plant) then this is a no go.

Thanks

Mike

9

[Max] I need help! / Re: Compositing with backplate and masking

« on: 2024-07-18, 13:47:49 »

Hi Aram,

Thanks for the reply. It's not the HDRI, backplate image etc which I have a problem with. Near the end of the video the author uses a vraymaterial with an opacity bitmap and enables the Matte option. Afaik Corona does not have a Matte option? Was wondering if there was a a way of doing this

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[Max] I need help! / Compositing with backplate and masking

« on: 2024-07-18, 09:59:35 »

Hi All,

I this video

 at the 14:23 minute mark the author shows how to partially obscure the 3d model using vray. I was wondering if there was a way to do something similar with Corona. I have seen people do it in post using masks photoshop but would prefer to do it in Max.

Thanks