Back Face Culling not working with added objects #34290

New Issue

Bao 2 · 2013-02-17T15:21:17+01:00

Bao 2 commented

2013-02-17 15:21:17 +01:00

%%%--- Operating System, Graphics card ---
Blender trunk 54608, linuxmint14 (ubuntu12.10) 64bits

- Short description of error ---

A created object and a added object from another file have different behaviour with back face culling when the
viewport is in texture shading mode (In solid mode there is no bug)

- Steps for others to reproduce the error (preferably based on attached .blend file) ---

Open the file and you see: Blender Internal renderer is selected, Backface Culling in the N panel checked, and the Viewport is using Texture as the mode of display. In the 3DView there are two objects named: "NewObject" and "AddedObject".

"NewObject" was created from scratch just to explain this bug.
"AddedObject" has been added from a former blender file created with a blender revision from 15 days ago, I don't remember the exact revision number.

The bug: Rotate the viewport to see the back of the two objects: Only one does the back face culling (NewObject). The AddedObject is wrong and doesn't obey backface culling.

I use these reference planes to modeling (several of them around the model) and if it doesn't obey backfaceculling they occlude my viewing of the model and then I have to go to the outliner to check/uncheck the visibility of these planes. I can create the planes again if it is not a bug, but perhaps some variable in the added object is not correctly set or something and perhaps you want to know about was my thinking. Also it would avoid me to recreate the near 40 reference planes I use normally!!!

A second bug?: Change the renderer to Cycles and we don't see any texture on the objects (and we have the viewport in Texture shading mode yet). Perhaps this is not coded yet when using Cycles and not a second bug. It would be great to show the texture when Cycles is selected too, avoiding switching to Blender Internal to modeling and back to Cycles, to render, continuously.

%%%

%%%--- Operating System, Graphics card --- Blender trunk 54608, linuxmint14 (ubuntu12.10) 64bits - Short description of error --- A created object and a added object from another file have different behaviour with back face culling when the viewport is in texture shading mode (In solid mode there is no bug) - Steps for others to reproduce the error (preferably based on attached .blend file) --- Open the file and you see: Blender Internal renderer is selected, Backface Culling in the N panel checked, and the Viewport is using Texture as the mode of display. In the 3DView there are two objects named: "NewObject" and "AddedObject". "NewObject" was created from scratch just to explain this bug. "AddedObject" has been added from a former blender file created with a blender revision from 15 days ago, I don't remember the exact revision number. The bug: Rotate the viewport to see the back of the two objects: Only one does the back face culling (NewObject). The AddedObject is wrong and doesn't obey backface culling. I use these reference planes to modeling (several of them around the model) and if it doesn't obey backfaceculling they occlude my viewing of the model and then I have to go to the outliner to check/uncheck the visibility of these planes. I can create the planes again if it is not a bug, but perhaps some variable in the added object is not correctly set or something and perhaps you want to know about was my thinking. Also it would avoid me to recreate the near 40 reference planes I use normally!!! A second bug?: Change the renderer to Cycles and we don't see any texture on the objects (and we have the viewport in Texture shading mode yet). Perhaps this is not coded yet when using Cycles and not a second bug. It would be great to show the texture when Cycles is selected too, avoiding switching to Blender Internal to modeling and back to Cycles, to render, continuously. %%%

Bao 2 commented

2013-02-17 15:21:17 +01:00

Changed status to: 'Open'

Brecht Van Lommel commented

2013-02-17 15:33:10 +01:00

%%%Regarding Cycles, that's not a bug, it uses a different way to assign textures to faces. There is no more distinction there between the render and viewport textures, it's all specified in the material.%%%

Stanislav Blinov commented

2013-02-17 16:43:18 +01:00

%%%Meanwhile, removing material from AddedObject may help you, Bao2.%%%

Brecht Van Lommel commented

2013-02-18 16:08:40 +01:00

%%%The problem is that material have their own backface culling setting for the game engine, which you can only see when you switch to Blender Game. The interaction here was not working entirely well, I've now made the setting in the 3D view override any material settings so that culling happens for all materials.%%%

Brecht Van Lommel commented

2013-02-18 16:08:40 +01:00

Changed status from 'Open' to: 'Resolved'

Brecht Van Lommel closed this issue

2013-02-18 16:08:40 +01:00

Shakanos commented

2013-06-09 22:38:19 +02:00

%%%Hi, Brecht.

I was looking for a solution to my problem and found this report. So I think the key to my problem may be here.

Just compare the behavior of the 'Backface Culling' checkbox in Properties Shelf in the 'Texture' vewport's mode on a new scene at 2.65 and at 2.67. In 2.67 this option has no effect. Culling always happen in 'Texture' mode (and in 'Solid' mode with 'Textured Solid' enabled).

Here simple example: http://www.pasteall.org/blend/22005 Open this file in 2.65 and in 2.67 and you can see difference.%%%

%%%Hi, Brecht. I was looking for a solution to my problem and found this report. So I think the key to my problem may be here. Just compare the behavior of the 'Backface Culling' checkbox in Properties Shelf in the 'Texture' vewport's mode on a new scene at 2.65 and at 2.67. In 2.67 this option has no effect. Culling always happen in 'Texture' mode (and in 'Solid' mode with 'Textured Solid' enabled). Here simple example: http://www.pasteall.org/blend/22005 Open this file in 2.65 and in 2.67 and you can see difference.%%%

Brecht Van Lommel commented

2013-06-09 22:56:55 +02:00

%%%It's intended to be different, 2.67 changed the behavior to what it was before the 3d viewport option was introduced. If you want to disable backface culling in textured draw mode you need to edit the material in Blender Game mode. There are two options here that influence the drawing behavior, one has to have priority.%%%

Shakanos commented

2013-06-09 23:42:26 +02:00

%%%But object in my example has no attached material at all. There is some hidden material?%%%

Brecht Van Lommel commented

2013-06-10 00:01:22 +02:00

%%%If there is no material, the object will use a default material and that has backface culling enabled.%%%

Shakanos commented

2013-06-10 00:14:20 +02:00

%%%Ok. Thanks for the explanation.
But I think that it is very not obvious for the users that they need to create a material and go to disable the option in the game engine in such a case. In 2.65 it was more predictable behavior.%%%

%%%Ok. Thanks for the explanation. But I think that it is very not obvious for the users that they need to create a material and go to disable the option in the game engine in such a case. In 2.65 it was more predictable behavior.%%%

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Back Face Culling not working with added objects #34290