Maniphest T54081

Object texture mapping using only 1/4 of the object surface
Closed, Archived
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Assigned To
Brecht Van Lommel (brecht)
Authored By
Niels Philipsen (NP)
Feb 15 2018, 4:44 PM
Tags
  • BF Blender
Subscribers
Brecht Van Lommel (brecht)
Carlo Andreacchio (candreacchio)
Niels Philipsen (NP)
Sergey Sharybin (sergey)

Description

Using an empty as a reference object to specify the texture coordinates only results in 1/4 of the area being used.

The empty is 3/4 bigger than the area that's being textured.

Best open the blend file to see for your self.

Blender 2.79 on Windows 8

Event Timeline

Niels Philipsen (NP) created this task.Feb 15 2018, 4:44 PM
Sergey Sharybin (sergey) lowered the priority of this task from 90 to 30.Feb 15 2018, 5:51 PM
Sergey Sharybin (sergey) added a subscriber: Sergey Sharybin (sergey).

There is no file attached.

Niels Philipsen (NP) added a comment.Feb 15 2018, 6:15 PM

BlenderBug_object_texture_mapping.blend267 KBDownload

Fixed

Carlo Andreacchio (candreacchio) added a subscriber: Carlo Andreacchio (candreacchio).Feb 16 2018, 3:40 AM

Not a bug. +U and +V are also correct but when it goes -U and -V, its being limited off by the extrapolation of the image textures (clip instead of repeat)

Brecht Van Lommel (brecht) changed the task status from Unknown Status to Unknown Status.Feb 16 2018, 1:32 PM
Brecht Van Lommel (brecht) claimed this task.
Brecht Van Lommel (brecht) added a subscriber: Brecht Van Lommel (brecht).

It makes a bit more sense with the default empty cross shape, then the image is in the corner.

Arguably it would have been better to center it by default, but this would break backwards compatibility and I don't think it's serious enough to make that kind of change.

Niels Philipsen (NP) added a comment.Feb 16 2018, 1:44 PM
In T54081#484775, @Carlo Andreacchio (candreacchio) wrote:

Not a bug. +U and +V are also correct but when it goes -U and -V, its being limited off by the extrapolation of the image textures (clip instead of repeat)

The texture that you can see in the render is in fact the entire texture, its not being cut off its being scaled. I will upload another blendfile with a blurry circle texture, this will better illustrate the problem.

The expected behaviour would be to have the texture fit within the bounds of the empty, not just 1/4th of the bounds. This was also the original behaviour of using an empty in the materials for the older Internal renderer.

Niels Philipsen (NP) added a comment.Feb 16 2018, 1:47 PM

Pitty it's already archived.

Placing decals on materials was more intuitive with the old behaviour.