Think of the Batman symbol, but reversed, i.e., the symbol would be brighter than the clouds.
How would one project light through a "stencil" (of any symbol/text) on clouds/fog/mist/or solid wall and have the remainder display?
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Sign up to join this communityThink of the Batman symbol, but reversed, i.e., the symbol would be brighter than the clouds.
How would one project light through a "stencil" (of any symbol/text) on clouds/fog/mist/or solid wall and have the remainder display?
You could either model your batman logo or get one from the internet in SVG file format and use it as an actual "geometry stencil" in your scene to block out light coming from a projector line. If you prefer you may also use an image texture as alpha map for your stencil
Just make sure your spot light is strong enough to make a visible influence and the size of the lamp is small enough so the shadows don't become too blurry, otherwise it may be difficult to make out the symbol
EDIT
For the materials simply use a Volume Scatter shader connected to the Volume socket of the Material Output. For the red volume use a very low density like 0.1 or less, for the blue volume receiving the symbol a higher density is acceptable like 1.0.
For a more physically accurate version mix a Volume Scatter and a Volume Absorption nodes using the Mix Shader node
With Cycles this is actually pretty straightforward. You create a mesh that's the shape you want to project and you shine a really bright light through the gaps, just like you would in real life. The tricky part will be getting it focused so that the image converges where you want it to... again, just like real life.
Cycles is so realistic, that you can actually simulate a pinhole camera with Cycles. So really, just do it the way it's really done.
With the Blender Internal renderer, it's not so straightforward, but still pretty easy. The best way would be to set a b&w image as the texture for a spot lamp. Then, the lamp will just shine that image on whatever you point it at.