Height Range Modifier applies to entire model if Start=0

[CapnBry]

Version

Version 2.1.0+win64

Operating system type + version

Windows 10 Pro 64bit

3D printer brand / version + firmware version (if known)

Any

Behavior

When using the new Height Range Modifier (sweet feature BTW), when I add any settings, the settings take effect over the entire object and use both the original and the modified settings which leads to infill in perimeters or double infill:

• Add 40mm cube to bed
• Right click "Height range Modifier"
• Right click the modifier in the list, add a "Layers and Perimeters" or infill
• In the case above I changed Perimeters from 3 to 5, note that now the entire model has 5 perimeters and also has 3 perimeters, both on top of each other and also in the infill.

Workaround 1

This can be worked around by setting the "Start at height" to non-zero, e.g. 0.01 or 1 or 10 or whatever so it seems somewhere is doing a if (start height != 0) instead of if (start height >= 0).

Workaround 2

This can also be worked around by turning on "Clip multi-part objects" in Print Settings -> Advanced, since it always works if that feature is on (although I do not have a multimaterial printer).

Project File (.3MF) where problem occurs

cube4040.zip

[Jebtrix]

More details on Clip multi-part objects setting:

Issue #2803
Issue #2887

[CapnBry]

Ah, I knew there had to be an issue open for this but I could not find it. I'll close this one and follow those. Thanks!

"Clip multi-part objects" should not be required to be turned on IMHO, since no other modifier meshes or right-click add modifier requires it to be turned on to generate non-overlapping gcode.