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Joining curves overrides other materials
Confirmed, NormalPublicBUG


System Information
Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: GeForce GTX 1080 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 456.71

Blender Version
Broken: version: 2.92.0, branch: master, commit date: 2021-02-24 16:25, hash: rB02948a2cab44

Short description of error
Joining two or more curve objects together will result in the curves being assigned the active object's material rather than keeping the material assigned to their points.

Exact steps for others to reproduce the error
Open the below file:

Use Ctrl+J to join the two curves together.

Event Timeline

Himanshi Kalra (calra) changed the task status from Needs Triage to Confirmed.EditedMay 9 2021, 9:07 PM

I can confirm this on Windows 10 on 3.0.0
Comparing it to Mesh, a new material is added when 2 meshes are combined.
Although here for Curves the color is of the Viewport Display only.

Color of viewport display is preserved when combining 2 meshes.

Himanshi Kalra (calra) changed the subtype of this task from "Report" to "Bug".May 9 2021, 9:11 PM