Tag Archives: appalachian trail

Using Blender’s Particle Systems for 3D Printing

One of the things that gives Blender its reputation of having a large learning curve is it is geared towards animation. It has a lot of extra features or capabilities we don’t use for 3D Printing.

Or do we?

Homesick for the Appalachian Trail, I embarked on making rhododendron themed drawer pulls. It was a Blender animation feature helped me pull off my vision. I had never heard of “Particle Systems” before and with good cause. They are typically used for animating dust, smoke, water, and hair. Thanks to a wonderful tutorial video by Blender Facile, I learned how I could also use this feature to convert a single flower model into the trademark ball of flowers for the rhododendron.

My steps for using the Particular System were:

  1. First, I made a model of an individual flower. Thinking about how I wanted this to be sturdy for people to grab, I kept the petals thick and shallow.
    Individual Flower
  2. To convert my single flower into a ball of flowers, the first thing I did was add an Ico Sphere with 2 subdivisions to my Blender project.
    Create - Icosphere
  3. I went ahead and removed the bottom half of my Ico Sphere and gave it a flat bottom.
  4. Once I was satisfied with my Ico Sphere, I clicked on the Particle Systems icon
    PArticleSystems
  5. I clicked on New to create a new Particle System
    PArticleSystemsNew
  6. I changed Type to “Hair
    Type-Hair
  7. I checked the Advanced box which would allow me to change some rotation settings later
    ParticleSystem-Advanced
  8. Under the Emissions section, I clicked Verts.  This is telling Blender that each “hair” (aka flower) is going to be associated with a vertex in my model.  For Number, I put in 26.  This just happens to be the number of vertices in my modified Ico Sphere.ParticleSystem-Verts
    I also unchecked the Random box.
    ParticleSystem-UncheckRandom
  9. Under the Rotation section, I first checked Rotation and then for Initial Orientation, I picked Normal.  The system is going to rely on my Face normals (the direction my faces are) to determine which way to rotate my “hairs”.
    ParticleSystem-RotationChecked-Normals
  10. Under the Render section, I picked Object and for Dupli Object, I selected the single Flower model I made.  And then my flowers appeared on my sphere.
    ParticleSystem-RotationChecked-AddObject
  11. Under the Render section, I checked Rotate and my flowers oriented themselves accordingly.
    ParticleSystem-RotationChecked-Check
  12. Since this is a feature geared towards animation, there is a large Physics section that really does not apply to my purposes.   The one thing I did play with was the SizeBy adjusting this setting, I was able to get my flowers to a size that provided some good coverage over the Ico Sphere.
    Size
  13. Once I was satisfied with all my settings, I clicked on the Modifiers icon and clicked on Convert.
    ParticleSystem-RotationChecked-ConvertParticles
  14. All of my “hairs” (aka flowers) became official objects in Blender.  I was able to click on each one and manipulate it like any other Blender object.  For example, I went ahead and rotated my bottom row of flowers to better achieve the look I was going for.
    Rotate Individual Flowers
Eureka!  I had my ball of flowers!  My modeling journey was far from over, but the hardest part about that journey was done, thanks to an animation feature I never thought I would need.