I have a simple shape and use it with 3d function extrud
to geht a shadow. How can I achieve this easily without 3 D functions?
Can be achieved with blends or the transform effect. Unless exporting to pixels you don't want to do either, because they create a boatload of paths.
That is an extrusion, not a shadow. If you want a vector dropshadow, use Effect > Stylize > Dropshadow and set the Blur to 0.
And be sure you are using the Illustrator Effects, not the Photoshop one.
It works with the answer of Ton Frederiks
Unfortunately I can't convert the svg as vector asset in Jetpack Compose
the shadow seems not working there tried
Effekte / Stilisierungseffekte / Schlagschatten
Effekte / SVG-Filer / AI-Schatten
The most simple way is to create 3 rectangles and shear them. My 2 cents. If you want isometric object lust use this scheme or isometric grid.