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Compositor: Redesign Sun Beams node #116787

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Omar Emara merged 1 commits from OmarEmaraDev/blender:redesign-sun-beams-node into main 2024-01-10 14:31:07 +01:00
Conversation 3 Commits 1 Files Changed 1 +33 -18
Omar Emara commented 2024-01-04 15:48:09 +01:00
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This patch redesigns the Sun Beams node. The old implementation produces
unexpected results with an arbitrary alpha channel, due to the use of a
step count normalization instead of a weighted normalization. The
quality is also questionable due to the use of nearest neighbour
interpolation as well as a low resolution integration.

This patches redesign the node to be a simple line integration towards
the source, limited by the maximum ray length. The sampling resolution
covers the entire path of the integration and the image is sampled using
bilinear filtering, producing smoother results. No alpha is introduced.

This patch redesigns the Sun Beams node. The old implementation produces unexpected results with an arbitrary alpha channel, due to the use of a step count normalization instead of a weighted normalization. The quality is also questionable due to the use of nearest neighbour interpolation as well as a low resolution integration. This patches redesign the node to be a simple line integration towards the source, limited by the maximum ray length. The sampling resolution covers the entire path of the integration and the image is sampled using bilinear filtering, producing smoother results. No alpha is introduced.
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Omar Emara added the
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Omar Emara added 1 commit 2024-01-04 15:48:20 +01:00
c771c50d4a Compositor: Redesign Sun Beams node 
This patch redesigns the Sun Beams node. The old implementation produces
unexpected results with an arbitrary alpha channel, due to the use of a
step count normalization instead of a weighted normalization. The
quality is also questionable due to the use of nearest neighbour
interpolation as well as a low resolution integration.

This patches redesign the node to be a simple line integration towards
the source, limited by the maximum ray length. The sampling resolution
covers the entire path of the integration and the image is sampled using
bilinear filtering, producing smoother results. No alpha is introduced.
Omar Emara commented 2024-01-04 15:55:34 +01:00
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Old (Notice weird alpha from nowhere):

20240104-162442.png

New:

20240104-162446.png

Old (Notice noise):

20240104-162527.png

New:

20240104-162531.png

Old (Notice pixelation):

20240104-162542.png

New:

20240104-162548.png

Old (Notice weird alpha from nowhere): ![20240104-162442.png](/attachments/8f223e2b-77e9-4c49-91b3-f386b9456c6b) New: ![20240104-162446.png](/attachments/6be11b6a-f2fd-4b7a-a7dc-dcb3871df1f3) Old (Notice noise): ![20240104-162527.png](/attachments/ac571e8d-1cbb-4c1d-8a32-6ae987b3ec05) New: ![20240104-162531.png](/attachments/36aa8c5a-af89-4d97-872c-2b81cc924760) Old (Notice pixelation): ![20240104-162542.png](/attachments/7fd2d4e3-3600-412e-a9eb-619538673454) New: ![20240104-162548.png](/attachments/2fd18792-b39a-4066-ba1c-bd4b08d1b7c5)
20240104-162548.png
760 KiB
20240104-162442.png
535 KiB
20240104-162531.png
754 KiB
20240104-162446.png
506 KiB
20240104-162542.png
759 KiB
20240104-162527.png
754 KiB
Omar Emara requested review from Sergey Sharybin 2024-01-04 15:56:05 +01:00
Sergey Sharybin commented 2024-01-09 12:05:19 +01:00
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The result looks so much better now indeed.

How does this compare to the CPU compositor? Do we need to do similar redesign there as well?

The result looks so much better now indeed. How does this compare to the CPU compositor? Do we need to do similar redesign there as well?
Omar Emara commented 2024-01-09 12:57:53 +01:00
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@Sergey Yes. I will do the same redesign for CPU if this is accepted.

@Sergey Yes. I will do the same redesign for CPU if this is accepted.
Sergey Sharybin approved these changes 2024-01-09 16:07:10 +01:00
Omar Emara merged commit 9e358fcd44 into main 2024-01-10 14:31:07 +01:00
Omar Emara deleted branch redesign-sun-beams-node 2024-01-10 14:31:09 +01:00
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