Supports placement with multiple objects

[DrJuJu]

PrusaSlicer
Version: 2.1.0+win64
Build: PrusaSlicer-2.1.0+win64-201909160915

Operating System: Windows
System Architecture: 64 bit
Windows Version: Windows 10 (build 18363), 64-bit edition
Total RAM size [MB]: 8,477MB
OpenGL installation
GL version: 4.6.0 - Build 26.20.100.7463
Vendor: Intel
Renderer: Intel(R) HD Graphics 530
GLSL version: 4.60 - Build 26.20.100.7463

Behavior

Created a compact platter to print the Braq Dragon Wings (https://www.thingiverse.com/thing:854575) Using the non support stl files

I've attached the gcode and Prusa Slicer config files.

Before starting the print run, all looked ok but after the print had completed I found that the slicer setting for "only on print bed" had been ignored, for the mid wing sections, which are partially under the larger wing sections, and the support for the larger, overhanging wing had been set onto the lower part.

It appears that the slicing process slices all objects separately, thereby ignoring any possible conflicts with other items on the platter.

I believe the system should have either issued a warning or generated a failure message with steps to correct the issue, i.e. re-arrange the parts.

Dragon_Wings_0.2mm_PLA.gcode.zip
PrusaSlicer_config_bundle.ini.txt

[FidelCapo]

This is a known issue. Supports are generated per object, so supports of one object can go through other objects.
I think this is duplicate of #316