3d viewer updates are unusably slow (6.0)

I have a project I transitioned from v5, now running in 6.0, and the rendering updates are just extremely slow. Once it’s displayed, panning and rotation is fine - it’s building the 3d model that is just so slow to make it pretty much unusable.

The same project in v5 rendered within 5-10 seconds, while in v6 it takes more than 5 minutes. Worse, it hangs the whole program while it updates.

Any ideas?

I know of two solutions.

  1. Unfilled all zones before opening the 3D view.

  2. Disable “show copper thickness”. See issue #10153.

This bug has been closed, so this setting is probably off by default in the latest testing build, but I’m not sure.

Much appreciated, this did help.

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