Maniphest T45001

Unexpected results when exporting from Blender as an ,obj . When importing back into a blender file.
Closed, Archived
Actions

Assigned To
Bastien Montagne (mont29)
Authored By
Roy Fancourt (RedSquare)
Jun 8 2015, 8:50 PM
Tags
  • BF Blender
Subscribers
Bastien Montagne (mont29)
Kuzey (Kuzey)
Philipp Oeser (lichtwerk)
Roy Fancourt (RedSquare)

Description

System Information
Operating system and graphics card Win 64 Ultimo embarrassed to say GTX 280

Blender Version
Broken: (example: 2.69.7 4b206af, see splash screen) Offical 2.74 000dfc0
Worked: (optional)

Short description of error Imported .obj has excessive sharpening of edges over and above those wanted.

Exact steps for others to reproduce the error
Based on a (as simple as possible) attached .blend file with minimum amount of steps

Please view video by pasting the following in to new browser widow to see what I'm encountering, there is sound. http://screencast.com/t/6zlRWDItElJd and hit enter.

I will also append the blend file if I can work out how.

Bottle_Opener_Bottom_6.0.6.blend1 MBDownload

Related Objects

Mentioned In
T80528: Imported objects have Mark Sharp applied on all edges (.obj, .fbx & .abc formats)
Mentioned Here
rB000dfc03190d: Point submodules to the final release tag

Event Timeline

Roy Fancourt (RedSquare) created this task.Jun 8 2015, 8:50 PM
Roy Fancourt (RedSquare) raised the priority of this task from to 90.
Roy Fancourt (RedSquare) updated the task description.
Roy Fancourt (RedSquare) added a project: BF Blender.
Roy Fancourt (RedSquare) edited a custom field.
Roy Fancourt (RedSquare) added a subscriber: Roy Fancourt (RedSquare).
Bastien Montagne (mont29) changed the task status from Unknown Status to Archived.Jun 8 2015, 9:54 PM
Bastien Montagne (mont29) claimed this task.
Bastien Montagne (mont29) added a subscriber: Bastien Montagne (mont29).

First of all, please write reports, videos are a pita to use for us (takes time to see them, not easy to come back on it, etc. etc.).

Anyway, thanks for the report, but no bug here. What happens is, you are exporting normals with your OBJ (face corner normals), and when importing that same .OBJ Blender automatically generates need sharp edges (since your shading is flat, and not smooth, in org .blend, each and every face gets its own set of normals, hence the nearly-all sharp edges on next import).

You want either to enabled custom normals (in Normals panel of Mesh buttons) with smooth shading, or not export normals with your OBJ (but note that sharp edges are not supported by OBJ format in itself, they have to be converted somehow if you want to keep them).

Philipp Oeser (lichtwerk) mentioned this in T80528: Imported objects have Mark Sharp applied on all edges (.obj, .fbx & .abc formats).Sep 7 2020, 10:53 AM
Philipp Oeser (lichtwerk) merged a task: T80528: Imported objects have Mark Sharp applied on all edges (.obj, .fbx & .abc formats).
Philipp Oeser (lichtwerk) added subscribers: Kuzey (Kuzey), Philipp Oeser (lichtwerk).