The old film camera
PencilChallenging

Practice a soft cylinder with one rolled towel. An elliptical spiral and loose hanging corner show the fabric’s layers without a dense woven texture.
Draw a near ellipse and extend soft sides toward the rounded far end. Let the edges sag gently rather than using perfect straight lines.
Draw a loose spiral within the near ellipse. Keep the spacing broad enough to read as folded fabric.
Bring one corner down from the roll and add a couple of broad folds. Keep graphite inside the spiral and beneath the corner.
A small thing to tryFollow the near ellipse when drawing the spiral so the roll keeps the same perspective.