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About the Author

Avatar image for Bart Veldhuizen
Bart Veldhuizen

I have a LONG history with Blender - I wrote some of the earliest Blender tutorials, worked for Not a Number and helped run the crowdfunding campaign that open sourced Blender (the first one on the internet!). I founded BlenderNation in 2006 and have been editing it every single day since then ;-) I also run the Blender Artists forum and I'm Head of Community at Sketchfab.


  1. Please disregard all of the entrys above.
    Tried to delete them but it just made them guest entrys

    Entry is from another robot contest.
    Comments are welcome.

  2. AspiringAnimator on

    Here's my entry, "Invasion...?"
    Mostly influenced by the futuristic smooth curve style.
    Rendered in Cycles.
    Comments and critiques appreciated! Enjoy! :)

      • SubjectNameHere on

        You're right, it's kind of annoying and seems to happen a lot with dark backgrounds. It's expecially noticeable in the thumbnail. Seems to be also a scaling issue.

      • Brendon Leenheer on

        Does anyone know if this is fixable in blender Internal? Cycles seems to have this problem less, but if it is a subtle gradient like this that causes the problem, could it just be an issue with the color variation in the images generated by blender internal?

        • I'm not all that familiar with BI, or even how he did the background, but since he said 'seems to be also a scaling issue', I suspect it could be an issue with scaling a gradient texture. Perhaps the built-in gradients aren't as smooth as they appear when scaled? May also be the type of gradient used, i.e. linear, quadratic, easing, etc. I should probably just shut up since I already said I don't know BI that well, but thought may ideas my spark an idea in someone else.

          • Brendon Leenheer on

            I also get this when the gradient is the result of a rendering with a point light and a plane extending away. This happens even with high ray tracing samples.

          • Ah, then I'm probably wrong. I also think by 'scaling' he may have meant the downsizing of the image in disqus, which would make me even more wrong. As I said, I should probably just keep my mouth shut. And as I say that....could it be some settings when saving as certain formats? Pretty sure most people upload jpg's, but there may be reasons to save as some other format then convert later.

            In the situation you described, does it happen using generated mapping as well as UV? Maybe 'generated' causes this effect?

            Hopefully my blithering will prompt someone smarter to correct me.

          • SubjectNameHere on

            What I found is, in my case (a simple studio backdrop), the banding seems to get more evident as I scale down the image, but I still can't manage to remove it entirely. Strangely enough, it completely disappears when I open the image in Gimp. Since I have encountered the artifact only with dark colours, I'm fairly sure it's because of the colour depth of the images (in fact, it gets much stronger in videos).

      • Vincent Holzborn on

        Nice Image!The problem with the bg is called color banding. I never really understood where it comes from, but the only thing I know to avoid this (as Victor S. Grau already metioned) is render in a higher bit depth and than scaling down afterwarts. A way to hide that is break the lines with a slight noise filter in PS or Gimp...

  3. Fulvio Silvano Fontana on

    Here's my entry, "Old robot". It's really old: it comes from the first tutorial I wrote (2009). I read the theme, I saw the image "Roboheads" and I couldn't resist! Blender 2.49b (Blender internal ;).

  4. "Recursion, Left Behind"
    During this weekend contest I attempted to create a story. I hope the title explains the story! Rendered in Blender Render and please enjoy ! :)

  5. It's been a while since my last contribution, so I guess it's about time. I've been grilling a lot lately. Namely grilling, while everyone else eats. I would love to have this fella accompanying me in the yard! :) Lots of great entries in here. I guess Blender people have a soft spot for robots :)

  6. Hi everybody! Here we are. Bart, I hope you're trip was amazing since the week without contest has been so long ;) ...Directly from de 80's….. THE RAPBOT!!! I hope you like it!! About 4 hours to do it.

  7. This is s robot handpupet i modeled in blender and printed on my Ultimaker 1 3D printer.
    i than painted it using acrylics and mad the body ot of leather (can I enterthis since its not a render but real object ??)

  8. As product lifecycles are getting shorter and shorter, the robot shown here will be part of any future factory ;-)

  9. curious.yellow on

    Hi all, This is my second attempt at the Weekend Contest. This image is inspired by a scene from the William Gibson novel “Count Zero”, where a robotic arm creates (Joseph) Cornell Boxes. Where better to place it than in a Cornell Box.

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