Cura: Lay Flat Does Not Work

[slurton]

Lay flat does not work on small objects.

[BagelOrb]

How small?
What kind of shape do they have?

Can you attach the file - or if that's not possible: a screenshot?

[slurton]

The part was no more than 2mm in width. I discovered that if I took snap off it worked.

[BagelOrb]

Problem reproduces easily with a cube scaled such that either X or Y is 2mm.

Problem goes away if total object is scaled to be larger.

This bug is genuine.

[Ghostkeeper]

I also found the problem with a 10x10x2mm cuboid (Z was 2 mm, the other two dimensions were 10mm).

[Ghostkeeper]

Our project manager just removed this from our planning though, because the issue is more than 12 weeks old.

[fieldOfView]

Probably due to this: https://github.com/Ultimaker/Uranium/blob/master/UM/Operations/LayFlatOperation.py#L54
The idea there is that if you have a large high-poly model, you probably don't want it to balance on a tiny triangle when there is a larger flat plane.