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Linear texture gradient range is not normalized #124142

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opened 2024-07-04 10:43:05 +02:00 by Serge Lyatin · 3 comments
Serge Lyatin commented 2024-07-04 10:43:05 +02:00
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System Information
Operating system: win10
Graphics card: 1050ti

Blender Version
Broken: 4.2
Worked: 4.1.1

Probably caused by 9ab72eae38

Short description of error
Linear texture gradient range is not normalized, thus bound values are not 0 and 1. Example pic is 128px render, but even with decent resolution there is some bias.
In 2.79b lowest value is 0 and highest <1.

Exact steps for others to reproduce the error
Render attached file and inspect bottom and top pixels > values are not 0 and 1

**System Information** Operating system: win10 Graphics card: 1050ti **Blender Version** Broken: 4.2 Worked: 4.1.1 Probably caused by 9ab72eae3843be5071c66de5afb50490d9ceb20c **Short description of error** Linear texture gradient range is not normalized, thus bound values are not 0 and 1. Example pic is 128px render, but even with decent resolution there is some bias. In 2.79b lowest value is 0 and highest <1. **Exact steps for others to reproduce the error** Render attached file and inspect bottom and top pixels > values are not 0 and 1
linear_texture_compositor.blend
116 KiB
pixel_info.png
24 KiB
pixel_info.png
Serge Lyatin added the
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 labels 2024-07-04 10:43:06 +02:00
Philipp Oeser commented 2024-07-04 11:26:23 +02:00
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Can confirm, will check (seems 4.1.1 was still good)

Can confirm, will check (seems 4.1.1 was still good)
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 labels 2024-07-04 11:28:49 +02:00
Philipp Oeser commented 2024-07-04 13:23:38 +02:00
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Probably caused by 9ab72eae38

@OmarEmaraDev : would you consider this an intentional change? (will set to high prio for now)

Probably caused by 9ab72eae3843be5071c66de5afb50490d9ceb20c @OmarEmaraDev : would you consider this an intentional change? (will set to high prio for now)
Philipp Oeser added
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 labels 2024-07-04 13:24:17 +02:00
Philipp Oeser added this to the 4.2 LTS milestone 2024-07-04 13:24:23 +02:00
Omar Emara commented 2024-07-04 13:36:23 +02:00
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It is an intentional change. Basically, textures are now always evaluated at the center of pixels. Previously it was a buggy conditional. This works better for all textures except maybe gradient, because you now miss the zero and end points. But hopefully once we introduce procedural texture in the compositor, this should be more flexible.

It is an intentional change. Basically, textures are now always evaluated at the center of pixels. Previously it was a buggy conditional. This works better for all textures except maybe gradient, because you now miss the zero and end points. But hopefully once we introduce procedural texture in the compositor, this should be more flexible.
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 labels 2024-07-04 13:36:30 +02:00
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Reference: blender/blender#124142
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