Curve front/back sides filling do not change when flipping the curve direction. #51664

New Issue

matali23 · 2017-05-30T10:21:27+02:00

matali23 commented

2017-05-30 10:21:27 +02:00

System Information
all

Blender Version
Broken: 94a3bc6

Short description of error
When switching directions on curves, everything adapts (animation, duplication, etc...), but not the cycles materials, although they should. See https://blender.stackexchange.com/questions/7918/how-to-flip-the-face-of-a-closed-2d-curve-similar-to-norm{F612724}al-flip-for-mesh

Exact steps for others to reproduce the error
Open attached file, call "switch direction", the sides are not flipped. Red and white side should be inverted. It works with meshes (flip normals).
bug normal curve.blend

**System Information** all **Blender Version** Broken: 94a3bc6 **Short description of error** When switching directions on curves, everything adapts (animation, duplication, etc...), but not the cycles materials, although they should. See https://blender.stackexchange.com/questions/7918/how-to-flip-the-face-of-a-closed-2d-curve-similar-to-norm{[F612724](https://archive.blender.org/developer/F612724/bug_normal_curve.blend)}al-flip-for-mesh **Exact steps for others to reproduce the error** Open attached file, call "switch direction", the sides are not flipped. Red and white side should be inverted. It works with meshes (flip normals). [bug normal curve.blend](https://archive.blender.org/developer/F612724/bug_normal_curve.blend)

matali23 commented

2017-05-30 10:21:27 +02:00

Changed status to: 'Open'

matali23 commented

2017-05-30 10:21:27 +02:00

Added subscriber: @matali23

Bastien Montagne commented

2017-05-30 14:01:48 +02:00

Added subscribers: @Sergey, @mont29

Sergey Sharybin was assigned by Bastien Montagne

2017-05-30 14:01:48 +02:00

Bastien Montagne commented

2017-05-30 14:01:48 +02:00

This has nothing to do specifically with Cycles, this is related to how curves are filled/tessellated in Blender.

Would not consider this a bug, but will let @Sergey decide here, he knows curves better.

This has nothing to do specifically with Cycles, this is related to how curves are filled/tessellated in Blender. Would not consider this a bug, but will let @Sergey decide here, he knows curves better.

Bastien Montagne changed title from ~~backfacing is wrong with curves in cycles~~ to Curve front/back sides filling do not change when flipping the curve direction.

2017-05-30 14:02:29 +02:00

matali23 commented

2017-05-30 15:43:32 +02:00

That would mean there is no way to flip faces of curves?

Sergey Sharybin commented

2017-05-31 13:41:18 +02:00

Changed status from 'Open' to: 'Archived'

Sergey Sharybin closed this issue

2017-05-31 13:41:18 +02:00

Sergey Sharybin commented

2017-05-31 13:41:18 +02:00

This is indeed not a bug. Normals are sort of procedural for curves, and making them dependent on spline direction will help in one cases but will make other cases absolutely confusing.

Surely that would be nice to have some solution to that, but it will not be part of the bug tracking process.

So thanks for the report, but it's not considered a bug.

This is indeed not a bug. Normals are sort of procedural for curves, and making them dependent on spline direction will help in one cases but will make other cases absolutely confusing. Surely that would be nice to have some solution to that, but it will not be part of the bug tracking process. So thanks for the report, but it's not considered a bug.

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Curve front/back sides filling do not change when flipping the curve direction. #51664