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gregzaal / Gaffer

A light-manager add-on for Blender
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Spot light gobos (textures) #5

Open gregzaal opened 7 years ago

gregzaal commented 7 years ago

https://en.wikipedia.org/wiki/Gobo_(lighting)

A simple way to add a texture to lamps with 3d widgets for positioning the texture.

Would be nice to have options for blur, tint, etc.

gregzaal commented 7 months ago

Some great CC0 gobos from Sebastiaan Fiolet here: https://www.3d-render.nl/tag/gobo/

gregzaal commented 7 months ago

I won't have time to implement this properly for the 3.2 release, but here's what I've learnt for when I do get to it:

There's two ways to do gobos in Blender:

  1. Light textures
    • Only works in Cycles.
    • Really easy to set up (literally plug an image texture into the Emission node.
    • Works best with spot lamps, but also technically works on point light and area lights. Does not work at all on sun lamps.
  2. Physical planes
    • Works in any renderer.
    • Fairly straightforward to set up the basics: It's just a plane with an image plugged into a Transparent shader, parented to the lamp.
    • Works with any type of light.
    • Will need controls for distance which affects softness of the shadows and potential issues like intersecting objects or casting additional shadows from other lights.
    • Can look weird in reflections