Moiré Effect

Roger Bansemer wrote on 2/3/2024, 1:00 PM

Every so often I have some video that gives me this moray effect in the preview window. I know it will render fine but why is this happening? Even when I switch to Preview/Best/Full I still get some of it. Resizing the preview window doesn't help either. Not a big deal but a little bit of an annoyance when editing.
By the way... I've been editing a large project and Vegas has not been crashing very often which I'm very happy about. Seems that some projects Vegas just decides to work like a charm and others occasionally acts like a bad child.

Comments

bvideo wrote on 2/3/2024, 1:09 PM

Nice painting.

The moire is happening only on your canvas. Does it have some kind of underlying grid? Maybe that creates an interference pattern with your monitor (probably not the camera sensor). Does the pattern change when you adjust the size of the preview?

Last changed by bvideo on 2/3/2024, 1:26 PM, changed a total of 1 times.

Dedicated: Vegas 20, 21, & 22, i7 8700k (UHD 630), 32 gig ram, ssd & 2 spinning units.

General purpose: i5 11400 (UHD 730), 32 gigs, ssd, 1 spinning unit (Vegas 21 & 22)

Roger Bansemer wrote on 2/3/2024, 1:37 PM

Nice painting.

The moire is happening only on your canvas. Does it have some kind of underlying grid? Maybe that creates an interference pattern with your monitor (probably not the camera sensor). Does the pattern change when you adjust the size of the preview?

The preview doesn't change when I change the preview size. No underlying grid on my painting or anything like that. And you're right, it's only on the canvas. Very strange.

3POINT wrote on 2/3/2024, 1:53 PM

 

No underlying grid on my painting or anything like that. And you're right, it's only on the canvas. Very strange.

Canvas always has a grid when it has been woven.

Roger Bansemer wrote on 2/3/2024, 2:29 PM

 

No underlying grid on my painting or anything like that. And you're right, it's only on the canvas. Very strange.

Canvas always has a grid when it has been woven.

Guess I'm not sure what a grid is or what that means.

fr0sty wrote on 2/3/2024, 5:38 PM

That's from the video being downscaled, due to the preview monitor not being full screen, and there not being enough pixels to draw the canvas without creating moire artifacts. I imagine to save processing power, VEGAS isn't using the highest quality resampling process. Sometimes moire is visible in the raw video out of a camera as well, so check for that.

Last changed by fr0sty on 2/3/2024, 5:39 PM, changed a total of 1 times.

Systems:

Desktop

AMD Ryzen 7 1800x 8 core 16 thread at stock speed

64GB 3000mhz DDR4

Geforce RTX 3090

Windows 10

Laptop:

ASUS Zenbook Pro Duo 32GB (9980HK CPU, RTX 2060 GPU, dual 4K touch screens, main one OLED HDR)

RogerS wrote on 2/3/2024, 10:17 PM

 

No underlying grid on my painting or anything like that. And you're right, it's only on the canvas. Very strange.

Canvas always has a grid when it has been woven.

Guess I'm not sure what a grid is or what that means.

Anything woven in tight patterns will yield interference patterns (moire) when viewed at a resolution insufficient to fully resolve the threads. So will other repeating patterns from brick walls to shingle roofs to telephone wires.

I struggle with this shooting fashion (woven clothing) all the time. If it's not in the final render just ignore it.

 

Roger Bansemer wrote on 2/4/2024, 7:45 AM

 

No underlying grid on my painting or anything like that. And you're right, it's only on the canvas. Very strange.

Canvas always has a grid when it has been woven.

Guess I'm not sure what a grid is or what that means.

Anything woven in tight patterns will yield interference patterns (moire) when viewed at a resolution insufficient to fully resolve the threads. So will other repeating patterns from brick walls to shingle roofs to telephone wires.

I struggle with this shooting fashion (woven clothing) all the time. If it's not in the final render just ignore it.

 

 

No underlying grid on my painting or anything like that. And you're right, it's only on the canvas. Very strange.

Canvas always has a grid when it has been woven.

Guess I'm not sure what a grid is or what that means.

Anything woven in tight patterns will yield interference patterns (moire) when viewed at a resolution insufficient to fully resolve the threads. So will other repeating patterns from brick walls to shingle roofs to telephone wires.

I struggle with this shooting fashion (woven clothing) all the time. If it's not in the final render just ignore it.

 

 

No underlying grid on my painting or anything like that. And you're right, it's only on the canvas. Very strange.

Canvas always has a grid when it has been woven.

Guess I'm not sure what a grid is or what that means.

Anything woven in tight patterns will yield interference patterns (moire) when viewed at a resolution insufficient to fully resolve the threads. So will other repeating patterns from brick walls to shingle roofs to telephone wires.

I struggle with this shooting fashion (woven clothing) all the time. If it's not in the final render just ignore it.

 

Good explanation. Thanks. I know it renders fine but was really curious about the why of it.

Reyfox wrote on 2/6/2024, 8:29 AM

@Roger Bansemer what camera are you using? Some come with an optical low pass filter over the sensor to reduce moire. Are you using any type of "sharpening" in your camera settings?

Newbie😁

Vegas Pro 22 (VP18-21 also installed)

Win 11 Pro always updated

AMD Ryzen 9 5950X 16 cores / 32 threads

32GB DDR4 3200

Sapphire RX6700XT 12GB Driver: 25.3.1

Gigabyte X570 Elite Motherboard

Panasonic G9, G7, FZ300

RogerS wrote on 2/6/2024, 8:38 AM

what camera are you using? Some come with an optical low pass filter over the sensor to reduce moire. Are you using any type of "sharpening" in your camera settings?

@Reyfox As the renders are fine, the moire is in the VEGAS preview not the footage.

Frosty wrote:

That's from the video being downscaled, due to the preview monitor not being full screen, and there not being enough pixels to draw the canvas without creating moire artifacts. I imagine to save processing power, VEGAS isn't using the highest quality resampling process.

Reyfox wrote on 2/6/2024, 8:57 AM

Thanks... I didn't quite read the post right.

But then, if the preview is full screen on a monitor, not a window, does it still happen?

Newbie😁

Vegas Pro 22 (VP18-21 also installed)

Win 11 Pro always updated

AMD Ryzen 9 5950X 16 cores / 32 threads

32GB DDR4 3200

Sapphire RX6700XT 12GB Driver: 25.3.1

Gigabyte X570 Elite Motherboard

Panasonic G9, G7, FZ300

Former user wrote on 2/6/2024, 9:21 AM

@Roger Bansemer Hi, that's an interesting effect/problem, could you share a short clip on Google Drive?