Boolean Modifier "Exact" solver does not apply target object material to created faces #86427

New Issue

Bruno · 2021-03-09T13:54:58+01:00

Bruno commented

2021-03-09 13:54:58 +01:00

System Information
Operating system: MacOS 10.13.6
Graphics card: NVidia GT 750M and Intel Iris Pro 1536 MB

system-info.txt

Blender Version
Broken: 2.93.0 alpha (blender-2.93.0-8618c4159c7b-macOS)
Worked: 2.92.0 stable

Short description of error

when using Difference or intersection, a boolean modifier operation creates new faces from the intersecting geometry. Those faces should get assigned the same material as the target boolean object chosen in the modifier. This is not happening when the Solver is "Exact".

Exact steps for others to reproduce the error

boolean material.blend

set the view port to "Material Preview" mode to be able to see the colors
create a cube and sphere objects with the sphere intersecting the cube
create a new basic diffuse material for the cube and one for the sphere with a different diffuse color
add the sphere material to the cube as second slot
add a Boolean modifier using the Difference or Intersection method to the cube and select the sphere as target Object

**System Information** Operating system: MacOS 10.13.6 Graphics card: NVidia GT 750M and Intel Iris Pro 1536 MB [system-info.txt](https://archive.blender.org/developer/F9881084/system-info.txt) **Blender Version** Broken: 2.93.0 alpha (blender-2.93.0-8618c4159c7b-macOS) Worked: 2.92.0 stable **Short description of error** when using Difference or intersection, a boolean modifier operation creates new faces from the intersecting geometry. Those faces should get assigned the same material as the target boolean object chosen in the modifier. This is not happening when the Solver is "Exact". ![boolean material.gif](https://archive.blender.org/developer/F9881078/boolean_material.gif) **Exact steps for others to reproduce the error** [boolean material.blend](https://archive.blender.org/developer/F9881075/boolean_material.blend) 1) set the view port to "Material Preview" mode to be able to see the colors 2) create a cube and sphere objects with the sphere intersecting the cube 3) create a new basic diffuse material for the cube and one for the sphere with a different diffuse color 4) add the sphere material to the cube as second slot 5) add a Boolean modifier using the Difference or Intersection method to the cube and select the sphere as target Object

Bruno commented

2021-03-09 13:54:58 +01:00

Added subscriber: @BlenderBruno

Falk David commented

2021-03-10 10:56:18 +01:00

Added subscriber: @filedescriptor

Falk David commented

2021-03-10 10:56:18 +01:00

Changed status from 'Needs Triage' to: 'Confirmed'

Falk David commented

2021-03-10 10:56:18 +01:00

I can reproduce this on the latest 2.93.0 Alpha, branch: master, commit date: 2021-03-10 04:47, hash: 70e73974b5.

I can reproduce this on the latest 2.93.0 Alpha, branch: master, commit date: 2021-03-10 04:47, hash: `70e73974b5`.

Falk David commented

2021-03-10 10:57:49 +01:00

Added subscriber: @howardt

Falk David commented

2021-03-10 10:57:49 +01:00

@howardt This is probably something for you :)

Howard Trickey self-assigned this 2021-03-11 04:28:35 +01:00

Howard Trickey commented

2021-03-11 04:28:35 +01:00

I was trying to reproduce the behavior of Fast, but it seems I misunderstood that behavior. Some experiments seemed to show that Fast just used the same slot # in the final result that was used for the material of the faces on the source (cutter) object, so that's what I did (if you add two more slots of materials to the icosphere and put the magenta material in the 3rd slot, which corresponds to where that material is in the cube, then it works). Also, if the target doesn't already have the source material somewhere in one of its slots, Fast doesn't copy the material over to the target. This seems kind of broken too, but I guess should, for now, just try to emulate exactly what the Fast mode does, which seems to be: look up the source material in the targets material slots: if found, use that slot #; if not found, just use the same slot #.

blender-admin commented

2021-03-14 16:39:56 +01:00

This issue was referenced by a01fb22f28

This issue was referenced by a01fb22f28df21acab103a5216591355b1dc85d7

Howard Trickey commented

2021-03-14 18:21:53 +01:00

Changed status from 'Confirmed' to: 'Resolved'

Howard Trickey closed this issue

2021-03-14 18:21:53 +01:00

Bruno commented

2021-03-16 01:57:34 +01:00

Thanks Howard and Team!

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Boolean Modifier "Exact" solver does not apply target object material to created faces #86427