Compositor 'converter->math->round' node does not use second input #48100

New Issue

Andrey Penyaz · 2016-04-10T15:41:00+02:00

Andrey Penyaz commented

2016-04-10 15:41:00 +02:00

System Information
Windows 7 x64, GF970
Blender Version
Broken: 2.77a abf6f08 (steam version)

Short description of error
I've tried to do simple posterization effect using round node,like described here, http://blenderartists.org/forum/showthread.php?244118-Cool-nodes-I-didn-t-know-about&p=2038344&viewfull=1#post2038344 , but looks like second input of round node does not do anything. Is it a bug or a feature?

Exact steps for others to reproduce the error
Here is minimal example{F301954}. I expected that second input of round node would create some posteriztion effect when value is reduced, but round node acts like. simple rounding to 0 and 1 and produce black and white image regardless of second value.

**System Information** Windows 7 x64, GF970 **Blender Version** Broken: 2.77a abf6f08 (steam version) **Short description of error** I've tried to do simple posterization effect using round node,like described here, http://blenderartists.org/forum/showthread.php?244118-Cool-nodes-I-didn-t-know-about&p=2038344&viewfull=1#post2038344 , but looks like second input of round node does not do anything. Is it a bug or a feature? **Exact steps for others to reproduce the error** Here is minimal example{[F301954](https://archive.blender.org/developer/F301954/Round_Bug.blend)}. I expected that second input of round node would create some posteriztion effect when value is reduced, but round node acts like. simple rounding to 0 and 1 and produce black and white image regardless of second value.

Andrey Penyaz commented

2016-04-10 15:41:00 +02:00

Changed status to: 'Open'

Andrey Penyaz commented

2016-04-10 15:41:00 +02:00

Added subscriber: @biliogadafr

Jim C commented

2016-04-10 22:13:38 +02:00

Added subscriber: @semaj-1

Jim C commented

2016-04-10 22:13:41 +02:00

Removed subscriber: @semaj-1

Jim C commented

2016-04-10 22:13:46 +02:00

Added subscriber: @semaj-1

Sergey Sharybin commented

2016-04-12 10:02:15 +02:00

Added subscriber: @Sergey

Sergey Sharybin commented

2016-04-12 10:02:15 +02:00

Changed status from 'Open' to: 'Archived'

Sergey Sharybin closed this issue

2016-04-12 10:02:15 +02:00

Sergey Sharybin self-assigned this 2016-04-12 10:02:15 +02:00

Sergey Sharybin commented

2016-04-12 10:02:15 +02:00

Round operation by itself is only using single value input. It simply rounds first input to a closest integer value.

Your setup is working correct, because compositor works with float images, where color range is usually [0..1]. So what you can do is to multiply color by some value, then round, and then divide color back.

Thanks for the report, but it's not a bug.

Round operation by itself is only using single value input. It simply rounds first input to a closest integer value. Your setup is working correct, because compositor works with float images, where color range is usually [0..1]. So what you can do is to multiply color by some value, then round, and then divide color back. Thanks for the report, but it's not a bug.

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Compositor 'converter->math->round' node does not use second input #48100