Hole Illusion Coasters - dual extruder

thingiverse

The coasters show a round hole illusion and a straight hole illusion. The .stl files are intended for 3D printers with two extruders. For the rounded hole illusion use these .stl files: - hole_illusion_210808f_210810c_black.stl - hole_illusion_210808f_210809e_white.stl For the straight edged hole illusion use these .stl files: - str_hole_illusion_210812_210812f_black.stl - str_hole_illusion_210812_210812e_white.stl The illusion works much better for me with black plastic and white plastic than other colors. The illusion and perspective were designed assuming that the eye is 30 cm directly above the coaster. Sketchup files are also provided. I used a MakerGear M3 ID dual extrusion printer (this was not an option under printer model) enjoy!