Image Editor don't display correct image during rendering at very high resolution #84578

New Issue

Jakub Jaszewski · 2021-01-10T22:56:39+01:00

Jakub Jaszewski commented

2021-01-10 22:56:39 +01:00

Following issue with high resolution rendering: #82042, #82591

Short description of error
In recent alpha build when rendering with both options CPU and hybrid GPU+CPU the image inside image editor during rendering is different than the same image after rendering, and also both of them are different than saved image on the disk.
(As a sidenote - threshold to trigger this behaviour should be setting image output size somewhere between 15000 and 19000px in width with constant proportion to height)

Image during rendering:

Image visible in image ditor after rendering finishes:

Here is closeup of the rendered and saved file:

Images have different resolution. Images inside image editor are displayed with rectangular pixels. Saved image have noise, image in image editor doesn't.
With such differences user is unable to validate scene, shader and render quality until the final image is saved to the disk:

Blender Version
Broken: 2.92.0 hash 6154aa1529 branch master
Worked: 2.90.1 hash 3e85bb34d0

Exact steps for others to reproduce the error

Open attached .blend file.
Hit F12 for render
zoom in until you clearly see individaual pixels
watch closely when rendering finishes image will flick and change to different one
after you save the result it will look completly different again

hi-res_image_editor.blend

Following issue with high resolution rendering: #82042, #82591 **Short description of error** In recent alpha build when rendering with both options CPU and hybrid GPU+CPU the image inside image editor during rendering is different than the same image after rendering, and also both of them are different than saved image on the disk. (As a sidenote - threshold to trigger this behaviour should be setting image output size somewhere between 15000 and 19000px in width with constant proportion to height) Image during rendering: ![TEST_IMAGE-EDITOR_during_rendering.png](https://archive.blender.org/developer/F9558779/TEST_IMAGE-EDITOR_during_rendering.png) Image visible in image ditor after rendering finishes: ![TEST_IMAGE-EDITOR_rendered_unsaved.png](https://archive.blender.org/developer/F9558783/TEST_IMAGE-EDITOR_rendered_unsaved.png) Here is closeup of the rendered and saved file: ![TEST_rendered_saved.png](https://archive.blender.org/developer/F9558793/TEST_rendered_saved.png) Images have different resolution. Images inside image editor are displayed with rectangular pixels. Saved image have noise, image in image editor doesn't. With such differences user is unable to validate scene, shader and render quality until the final image is saved to the disk: ![comparison.png](https://archive.blender.org/developer/F9558813/comparison.png) **Blender Version** Broken: 2.92.0 hash 6154aa1529b7 branch master Worked: 2.90.1 hash 3e85bb34d0d7 **Exact steps for others to reproduce the error** - Open attached .blend file. - Hit F12 for render - zoom in until you clearly see individaual pixels - watch closely when rendering finishes image will flick and change to different one - after you save the result it will look completly different again [hi-res_image_editor.blend](https://archive.blender.org/developer/F9558826/hi-res_image_editor.blend)

Jakub Jaszewski commented

2021-01-10 22:56:39 +01:00

Added subscriber: @silex

Jakub Jaszewski changed title from ~~Image Editor doesn't display correct image during rendering at very high resolution~~ to Image Editor don't display correct image during rendering at very high resolution

2021-01-10 23:18:32 +01:00

Falk David commented

2021-01-11 10:18:47 +01:00

Added subscriber: @filedescriptor

Falk David commented

2021-01-11 10:18:47 +01:00

I cannot reproduce the issue.

During Render:

After:

They have the same resolution.

I cannot reproduce the issue. During Render: ![during_render.png](https://archive.blender.org/developer/F9559591/during_render.png) After: ![after.png](https://archive.blender.org/developer/F9559593/after.png) They have the same resolution.

Jakub Jaszewski commented

2021-01-11 10:40:31 +01:00

Thank you for checking. Please don't close it yet.
I assume you didn't change image output size from 19200x10800px?
If you can please save the rendered image and compare resolution of the image inside image editor in Blender with the resolution of the saved image. More feature-rich scene might be better example.

In my report resolution of the images inside image editor stays the same, but the pixels are shifted. The resolution difference is visible between image inside image editor and saved rendered image to the disk (opened with regular image viewer - just like in 4th picture in report).

Thank you for checking. Please don't close it yet. I assume you didn't change image output size from 19200x10800px? If you can please save the rendered image and compare resolution of the image inside image editor in Blender with the resolution of the saved image. More feature-rich scene might be better example. In my report resolution of the images inside image editor stays the same, but the pixels are shifted. The resolution difference is visible between image inside image editor and saved rendered image to the disk (opened with regular image viewer - just like in 4th picture in report).

Falk David commented

2021-01-11 10:53:22 +01:00

I did not change the resolution and I have saved the render after. I don't see any difference in the pixels (Although it's hard to say without actually calculating the difference).

This is the saved render:

I did not change the resolution and I have saved the render after. I don't see any difference in the pixels (Although it's hard to say without actually calculating the difference). This is the saved render: ![render_zoom.png](https://archive.blender.org/developer/F9559637/render_zoom.png)

Jakub Jaszewski commented

2021-01-11 10:55:56 +01:00

It's hard to tell from the image you attached, becase of the feature you chosed. In my 4th picture features on both images have the same size but different resolution.

Clément Foucault commented

2021-01-11 11:05:58 +01:00

Added subscribers: @Jeroen-Bakker, @fclem

Clément Foucault commented

2021-01-11 11:05:58 +01:00

Since 2.92 we use full sized buffer for displaying render result. But if the output is too big, we resize it so it can fit the GPU limitations (which is usually 16K these days).
We have the same issue if a texture is above this limit.

@Jeroen-Bakker will be working on a workaround for high resolution image display.

Since 2.92 we use full sized buffer for displaying render result. But if the output is too big, we resize it so it can fit the GPU limitations (which is usually 16K these days). We have the same issue if a texture is above this limit. @Jeroen-Bakker will be working on a workaround for high resolution image display.

Clément Foucault commented

2021-01-11 11:06:21 +01:00

Changed status from 'Needs Triage' to: 'Confirmed'

Jakub Jaszewski commented

2022-01-28 22:05:06 +01:00

Fixed by https://developer.blender.org/rBbdd74e1e9338b18e4f80458f284d0c6a4d100f30
This report can be closed.
Thank you for your work @Jeroen-Bakker @fclem

Fixed by https://developer.blender.org/rBbdd74e1e9338b18e4f80458f284d0c6a4d100f30 This report can be closed. Thank you for your work @Jeroen-Bakker @fclem

Jeroen Bakker commented

2022-01-29 08:36:53 +01:00

Changed status from 'Confirmed' to: 'Resolved'

Jeroen Bakker closed this issue

2022-01-29 08:36:53 +01:00

Jeroen Bakker self-assigned this 2022-01-29 08:36:53 +01:00

Jeroen Bakker commented

2022-01-29 09:27:25 +01:00

Thanks for testing and reaching back to us!

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Image Editor don't display correct image during rendering at very high resolution #84578