quick scripts for openscad
color("red",1) import("path/to/your-part.stl");
flatpak run org.openscad.OpenSCAD -o test.png --projection orthogonal test.scad
with camera orientation but no scaling
flatpak run org.openscad.OpenSCAD -o test.png --autocenter --viewall --camera 0,0,0,-30,60,0,1000 --projection orthogonal test.scad