Blurry text compare to the rest of the scene in Cycles (Blender 4.1.1) #120968

New Issue

Gioxyer · 2024-04-23T11:16:59+02:00

Gioxyer commented

2024-04-23 11:16:59 +02:00

System Information
Operating system: Windows 11 Home
Graphics card: Ryzen 5 5500U with Vega 7 (Mobile version)

Blender Version
Broken: (example: 4.1.1, official release, as found on the splash screen)
Worked: /

Short description of error
Basically text looks grainy compare to the final render scene, denoise activated (0.01), open image denoiser, 300 as render frame, if I go higher 4096 for example text has the same issue

I already apply remesh and bevel to fix this problem, but still persist

Exact steps for others to reproduce the error
Open Blender
Render Image
Find result different looks grainy text compare to the final image scenario

**System Information** Operating system: Windows 11 Home Graphics card: Ryzen 5 5500U with Vega 7 (Mobile version) **Blender Version** Broken: (example: 4.1.1, official release, as found on the splash screen) Worked: / **Short description of error** Basically text looks grainy compare to the final render scene, denoise activated (0.01), open image denoiser, 300 as render frame, if I go higher 4096 for example text has the same issue I already apply remesh and bevel to fix this problem, but still persist **Exact steps for others to reproduce the error** Open Blender Render Image Find result different looks grainy text compare to the final image scenario

rUts2syk.png

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f5zsv4e6.png

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Rosa progetto - Copia v2.blend

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f5zsv4e6.png

1.5 MiB

Gioxyer added the

labels 2024-04-23 11:17:00 +02:00

Alaska commented

2024-04-23 11:59:17 +02:00

The title of your report is that the text looks blurry. But the body of your report says that the text looks grainy. And you talk about sample counts, which sounds like you're talking about noise (similar to grain). But you're also talking about applying remesh and bevel modifiers, which suggests you might be talking about how something looks blocky. Can you please clarify which issue you're experiencing?

From what I can tell in the images provided, you have a blocky issue?

And just so we both agree on termanology, here are example images for each:

Grainy/Noisy	Blurry	Blocky

Grainy/noisy: This is when you have random changes in brightness/colour across an area of a image.	Blurry: The image looks out of focus with details blending in with each other.	The text looks like it's made out of squares or cubes or something similar.

I'm sorry I haven't tested your file yet. It's estimated to take 1-2 hours to download, and so I won't be able to test it until after that time.

The title of your report is that the text looks blurry. But the body of your report says that the text looks grainy. And you talk about sample counts, which sounds like you're talking about noise (similar to grain). But you're also talking about applying remesh and bevel modifiers, which suggests you might be talking about how something looks blocky. Can you please clarify which issue you're experiencing? From what I can tell in the images provided, you have a blocky issue? And just so we both agree on termanology, here are example images for each: |Grainy/Noisy|Blurry|Blocky| |-|-|-| |![Grainy.png](/attachments/670d38cd-7dc2-4cc2-b9ad-3df1d1996a47)|![Blurry.png](/attachments/f3eae80f-bc50-4d8a-8056-8c6979b5c300)|![Blocky.png](/attachments/12a52b9a-f55f-4ca9-8f9c-2adf6da2fbe9)| |Grainy/noisy: This is when you have random changes in brightness/colour across an area of a image.|Blurry: The image looks out of focus with details blending in with each other.|The text looks like it's made out of squares or cubes or something similar.| --- I'm sorry I haven't tested your file yet. It's estimated to take 1-2 hours to download, and so I won't be able to test it until after that time.

Blocky.png

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Blurry.png

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Grainy.png

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Alaska added

Status

Needs Information from User

and removed

Status

Needs Triage

labels 2024-04-23 11:59:28 +02:00

Gioxyer commented

2024-04-23 12:07:34 +02:00

Hi, thanks for answer, basically the problem is a mix of grainy and blurry, in particular blurry, there is also a previous version inside the file hidden in the proprieties layer that is before apply changes, already included.

Gioxyer commented

2024-04-23 12:16:10 +02:00

I added a view from only text to see the actual result as main problem

mLIxc2FD.png

86 KiB

Alaska commented

2024-04-23 13:29:47 +02:00

I added a view from only text to see the actual result as main problem

Looking at the image provided, it's blurry (but that's just because it's low resolution). But I couldn't see any grain/noise.

I also took a closer look at the original images you uploaded and rendered the file, and I couldn't see any grain/noise on those either. The text does look a little blurry, but I don't think it's because of a bug in Cycles. I think it's just because of the low contrast between the white/blue letters and the blue background, combined with the fact some of the letters are really small or have small details.

I will note that Cycles (and some other render engines) can make small details look blurry because of how they sample pixels. For example Cycles samples a pixel over an area 1.5x the size of the pixel, causing a subtle blur. If you want too, you can reduce the size of the area the pixel samples, decreasing this blurriness, in trade for aliasing/pixalation. Just adjust the setting here:

Note: Setting this value too high or too low can cause issues with denoisers because they're typically designed for a value around 1.5x.

Note on the graininess/noise.
Blender, and some screens use a technique known as dithering. If done improperly, or viewed under the right conditions, it can look like noise/grain. This might be what you're seeing, some form of dithering. However I'm not 100% sure on this one, because if dithering is the cause, then you would probably see it in other parts of the scene. Maybe there's other factors here? Like maybe I'm just not noticing it, it can be a subjective thing.

I will set the report back to "Needs triage" in hopes we get a second opinion on this. Is the text unreasonably blurry or grainy for anyone else?

> I added a view from only text to see the actual result as main problem Looking at the image provided, it's blurry (but that's just because it's low resolution). But I couldn't see any grain/noise. I also took a closer look at the original images you uploaded and rendered the file, and I couldn't see any grain/noise on those either. The text does look a little blurry, but I don't think it's because of a bug in Cycles. I think it's just because of the low contrast between the white/blue letters and the blue background, combined with the fact some of the letters are really small or have small details. I will note that Cycles (and some other render engines) can make small details look blurry because of how they sample pixels. For example Cycles samples a pixel over an area 1.5x the size of the pixel, causing a subtle blur. If you want too, you can reduce the size of the area the pixel samples, decreasing this blurriness, in trade for aliasing/pixalation. Just adjust the setting here: ![Location of pixel size.jpg](/attachments/69389601-0dec-46f8-8b4f-1e5c855fa162) Note: Setting this value too high or too low can cause issues with denoisers because they're typically designed for a value around 1.5x. --- Note on the graininess/noise. Blender, and some screens use a technique known as dithering. If done improperly, or viewed under the right conditions, it can look like noise/grain. This **might** be what you're seeing, some form of dithering. However I'm not 100% sure on this one, because if dithering is the cause, then you would probably see it in other parts of the scene. Maybe there's other factors here? Like maybe I'm just not noticing it, it can be a subjective thing. I will set the report back to "Needs triage" in hopes we get a second opinion on this. Is the text unreasonably blurry or grainy for anyone else?

Location of pixel size.jpg

118 KiB

Alaska added

Status

Needs Triage

and removed

Status

Needs Information from User

labels 2024-04-23 13:29:59 +02:00

Gioxyer commented

2024-04-23 13:47:02 +02:00

I'll try with lower the area with pixel filter and I'll update as soon as possible, probably also some issues with the text could be the cause of the problem, I already included an hide version without any modifiers applied

Gioxyer commented

2024-04-23 15:36:27 +02:00

It doesn't change too much, with value of 1 instead of 1.5

Adding also this version of blend file without modifiers applied

It doesn't change too much, with value of 1 instead of 1.5 ![image](/attachments/19df5c6f-99e5-4616-8000-fe797f302f60) Adding also this version of blend file without modifiers applied

MAEZE text problem v2.blend

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image.png

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Richard Antalik commented

2024-04-24 00:14:32 +02:00

To me it also looks that the test is not more blurry than the rose. IMO it's just too small and "chunky" along with low contrast.