Blender 3d Creating Hologram with Cycles Engine

Posts

• spacefighter2 Posts: 0Member

  June 2014 #2

  i could explain how to make a hologram in blender internal(i don't use cycles personally as it is too slow). it's really simple. just cut out some shapes and make a new material for them. make sure these shapes are cut into whatever 2d forms you want to have in the hologram(if you want 3d forms in the hologram model them as you normally would). the material should be given a "diffuse" of whatever colour is most appropriate(blue or green i guess) and a "spec value" of 0 (as the hologram cannot possibly reflect anything). under "shading" give this material an "emit" value (the higher you make it the larger a lens flare you can cause if you are using the right render settings). tick the box under "transparency" then select "z transparency" and fiddle with the "alpha" setting until the material shown in the preview box looks about right. you could also apply a texture but you would need to ensure the texture did not interfere with the alpha value. finally create the impression of it being projected by modelling a tiny glowing hemisphere with a transparent material similar to what you used for the hologram itself(embedded into whatever it is projecting from) and placing a "spot" light inside this hemisphere pointing towards the projection. give the spot lamp the following settings:
  !lamp!
  spot
  colour to same colour as projection
  energy=2
  falloff
  constant
  distance(a little more than from the sphere to your projection)
  diffuse turned on
  all other tick boxes left off
  !shadow"
  buffer shadow
  colour black
  buffer type"classic halfway"
  filter type"box"
  soft=3
  bias=1
  clip start=0.5
  size=512
  samples=3
  clip end=40 all tick boxes left unchecked
  !spot shape!
  size=whatever angle to fit the edges of your projection
  blend=0
  square=off
  show cone=on
  halo=on
  intensity=1.6
  step=2
  !custom properties!
  none
  
  
  now add a plane just on the projection side of the glowing sphere
  go into edit mode and subdivide it into atleast 10 by 10 small squares, delete some of these squares randomly to make a mask
  then give this plane a materials as follows
  !diffuse!
  don't fill in anything here
  !specular!
  don't do anything here either
  !shading!
  tick "shadeless"
  set "translucency"=0
  !transparency!
  leave off
  !mirror!
  leave off
  !subsurface scattering!
  leave off
  !strand!
  root=1
  tip=1
  minimum=0.001
  blender units=off
  tangent shading is greyed out
  shape=0
  width fade=0
  uv not set
  distance=0
  !options!
  traceable=on
  use mist=on
  pass index=0
  all other tick boxes off
  !shadow!
  receive=on
  receive transparent=off
  cast only=on
  casting alpha=1
  shadows only=on
  select "shadow and distance"
  cast buffer shadows=on
  buffer bias=0
  auto ray bias=on
  ray bias is greyed out
  cast approximate=on
  !custom properties!
  none
  
  
  
  with all this done you should get a glowing hologram projection hovering in space with a glowing light nearby appearing to be it's source and casting what are sometimes called "crepuscular rays" as if the source was only sending light to certain bits of the projection. if you want to be really precise design the plane with the holes in it so that the holes match up with the glowing parts of the hologram and the solid parts of this mask line up with the dark bits.
  
  as a note this works for render settings of
  blender internal with "raytracing","subsurface scattering" and "environment map" turned off under "shading" in the render settings tab and "environment lighting"=on, gather="raytrace" under the world tab. it probably works fine for other render settings in internal but those are the ones i use as they are nice and fast.
• Kalshion0 Posts: 0Member

  June 2014 #3

  Sorry it took so long to get back to ya, I'd actually found a tutorial a little bit ago that explained a bit on how to make a hologram.. although I'm still screwing around with it
• spacefighter2 Posts: 0Member

  June 2014 #4

  i can assure you my instructions work. if you really need help i can upload a blend file to show you them.