Spiral galaxy fine ink study
FinelinerMedium

One isolated bowl-shaped lunar crater in oblique view, an oval raised rim and recessed floor, no landscape beyond a small local ground patch. Practice form, overlap and selective shading in black and gray marker.
Set the outer crater ellipse and smaller floor ellipse.
Connect the rim slopes to the recessed floor.
Use selective interior marks and local shadow groups to explain the overlaps. Keep the lighter planes open rather than shading every surface.
A small thing to tryMake the far inner wall visible above the crater floor.