Dadda-the-hutt

its sometimes caused by the anti-aliasing. most people recomend rendering at twice the resolution you need with AA off, then using graphics software to shrink the image size down using bicubic sampling.

Brilliant work! Ive seen your Flickr page too... very nice. I personally love the 'glossy'ness of the brick surfaces. I must learn blender a bit more i feel... all renders are coming out very noisy/spekled. Been trying to replicate your simple studio setup (image above the fireman). Are the black boxes some type of lighting? Keep up the good work...