Get a copy of Scott Robertson "How to Draw" and do the exercises. More specifically the perspective is not working (too flat and some lines not in perspective) , the moment you loose the perspective relationship, you've lost the drawing, here's my unrequested 5 minute sketch review (+ 5 minutes compiling in photoshop + 5 minutes doing this post) :
- I started with a perspective grid on an index card, imagining a cube around the elliptical shape, then just doing a bunch of freehand circles and blocky shapes that might become the cushions, all while trying to send the lines to imaginary perspective points.
- Flipped the index card (instant overlay) and went over the ellipses that worked and finished the cushions, I unfortunately did too many and screwed the line weights, but I would do a 2nd overlay if I had time, I also made the shape a little less circular, to avoid sending loungers rolling down a hill : )
- Since I already had a 3d cad program open, I did a quick (30 seconds) render of the shape to help me with the light direction and shading ; I then added some shadows and highlights with a couple of copic markers and a white pencil, it's a crutch and somehow inaccurate, the highlights on the cushions on the shadow side are inaccurate, but for quick thumbnails it works, a better rendering strategy might come later.
- I omitted a human mannequin to indicate size since it's a whole different ball of wax, but I think it would be a nice addition.
While the end product is still the same concept, I think it reads a little better, Anyways, back to work : )