Replicate the light coming from a projector

Question

Trying to create projection light to put on a scene like this 1

^{Click to enlarge.}

Example of the light I want to create.

How would I do something like this?

Answer 1

I'm sure you used the search function and found how to make a projector spot lamp in cycles.

With this node setup you only need to add a cube with a Volume Scatter to create the volumetric lighting.

• Use a highly saturated image.
• Use a high contrast image.
• If your image is neither, increase saturation and contrast with material nodes.
• Use a low lamp size (0.0), otherwise your image will be blurry.
• Use a strong lamp emission intensity (my value: 7000).
• Use a small density of the volume scatter material.
• Only encase the necessary areas with the volume scatter node to speed up rendering .