@pyates A quick comparison http://t.co/23qDd7YiPR no idea if its all true
Here are all my renders I have created. Most are created with Blender, Gimp or Terragen.
blender boxes
abstract 
cube2 
cube 
earth 
garmin gps 
hairball 
hedgehog-first 
hedgehog-grass2 
hedgehog-grass3 
hedgehog-grass 
mug wip render 2 
pencil sharpener 
radiosity 
rothaus 
staedtler pen 
the sun test 
torch-1-hr 
whirlwind 
wip earth hyperion 2 added engine glow