Here's a collection of spiral-shaped ornaments that I designed in Blender. You can get beautiful results by switching colors as they print.
Please also see:
Printer brand: Anycubic
Printer: All-metal Mega
Rafts: Yes
Supports: Yes
Resolution: 0.2
Infill: 15%
Filament brand: TTYT3D
Filament color: Red, Purple, Silver, Gold, Copper
Filament material: PLA
Notes:
Print the teardrop ornaments upside down (point facing up) and keep the temperature down. I found 195 degrees works well. Higher temps could result in the top melting as it prints.
The teardrops print well with support's overhang angle set to 57 degrees.
The spherical design prints well with support's overhang angle set to 67 degrees.
I recommend printing them at 100% or larger. The structure is already rather thin. You might go as small as 75%, but it may impact printing or create a very fragile object. If you own cats, don't print below 100%.