Yes, a better render would be easier to critique. Nerver heard of this cool "KnotPlot" - will have to investigate! Composition: Guess you wanted to include the left shadow, but that unbalances the composition. Add more on the right as well, or crop off some of the left. Light: Shadows are too soft, as are the highlights. More contrast (brighter highlights and sharper/darker shadows will give your objects more 3D "form". Shadows should be sharper near the casting object, and blur as they get farther away (but don't ask me how to do that - something about sun size or number of light ray bundles or cone angle or such). I like to color the sun rather yellow and the shadows rather blue. Making the one warmer and the other cooler seems to help the illusion of depth (since cool colors "recede" in human vision). But watch that the bluer shadows don't blend the shadowed part of the white object with the blue object. In fact, maybe the blue object should be a different (warm) color, so it stands out more from the blue-gray floor and such? Maybe you would get more highlight/shadow detail on all these intricate forms if you just scaled everything up by 10X? Or maybe it just needs a better render. Very nice work so far - well worth the effort of getting everything "just right". And always nice to see someone willing to take advice and striving for perfection. What fun is art, if you don't use it as one place where you can really do your very, very best?