Generated (ORCO) texture mapping is wrong #40580

New Issue

Fabian Emmes · 2014-06-11T17:14:23+02:00

Fabian Emmes commented

2014-06-11 17:14:23 +02:00

Blender Version
Broken: current master, e53c00a2

Setting the texture coordinates to "Generated" (ORCO) in the texture properties panel, will not use the original coordinates, but (apparently) coordinates normalized to the bounding box of the object.

This can be seen in mapping_bug.blend, where both squares have the same (local) vertex coordinates, but "Plane.001" has an additional triangle, extending its bounding box. This results in both squares being mapped differently, although they have the same coordinates.

Suggestions: Change the documentation of the "Generated" setting from "Use the original undeformed coordinates of object" to something like "Use the bounding box coordinates of object.". Additionally, add an option called "Local" with the former description "Use the original undeformed coordinates of object", which doesn't uses the local coordinates of the object.

**Blender Version** Broken: current master, e53c00a2 Setting the texture coordinates to "Generated" (ORCO) in the texture properties panel, will not use the original coordinates, but (apparently) coordinates normalized to the bounding box of the object. This can be seen in [mapping_bug.blend](https://archive.blender.org/developer/F93909/mapping_bug.blend), where both squares have the same (local) vertex coordinates, but "Plane.001" has an additional triangle, extending its bounding box. This results in both squares being mapped differently, although they have the same coordinates. Suggestions: Change the documentation of the "Generated" setting from "Use the original undeformed coordinates of object" to something like "Use the bounding box coordinates of object.". Additionally, add an option called "Local" with the former description "Use the original undeformed coordinates of object", which doesn't uses the local coordinates of the object.

Fabian Emmes commented

2014-06-11 17:14:23 +02:00

Changed status to: 'Open'

Fabian Emmes commented

2014-06-11 17:14:23 +02:00

Added subscriber: @der_fab

Fabian Emmes commented

2014-06-11 17:43:57 +02:00

The last sentence should read: Additionally, add an option called "Local" with the former description "Use the original undeformed coordinates of object", which uses the local coordinates of the object.

Sergey Sharybin commented

2014-06-12 10:13:18 +02:00

Added subscriber: @Sergey

Sergey Sharybin commented

2014-06-12 10:13:18 +02:00

Well, this is actually how blender works and the original wording is much closer to what's actually happens here: it gets original (undeformed) coordinates and maps them to the original bounding box in order to get reliable s,t coordinates of the textures. It doesn't use final object's BB as it sounds from your description.

Description could be improved here, but we can't do it now because RC should happen today and such a change would break all the translations. We'll look into changing the wording after the release.

To get behavior you're looking for you can use Object mapping and point to self.

Since it's not strictly speaking a bug, archiving it. As was mentioned we'll try to improve wording after the release.

Well, this is actually how blender works and the original wording is much closer to what's actually happens here: it gets original (undeformed) coordinates and maps them to the original bounding box in order to get reliable s,t coordinates of the textures. It doesn't use final object's BB as it sounds from your description. Description could be improved here, but we can't do it now because RC should happen today and such a change would break all the translations. We'll look into changing the wording after the release. To get behavior you're looking for you can use Object mapping and point to self. Since it's not strictly speaking a bug, archiving it. As was mentioned we'll try to improve wording after the release.

Sergey Sharybin commented

2014-06-12 10:14:22 +02:00

Changed status from 'Open' to: 'Archived'

Sergey Sharybin closed this issue

2014-06-12 10:14:22 +02:00

Sergey Sharybin self-assigned this 2014-06-12 10:14:22 +02:00

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Generated (ORCO) texture mapping is wrong #40580