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I have made some lights here using a texture with dots and a transparent background. As you can see in the image, the switch to turn them on or off is the Fac value in the mix shader. This works just as I want, but now I also want to be able to switch the emission on from bottom up in an animation over time. How can I implement this?

Thanks in advance. enter image description here

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you can get this:

enter image description here

by this node setup:

enter image description here

Just change the threshold to see the effect.

Blend file:

if you add one more math node...

enter image description here

you get:

enter image description here

my personal favorite: ;)

enter image description here

enter image description here

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  • $\begingroup$ You can probably also clamp it somewhere to only light up whole dots (to mimic actual light bulbs turning on/off) $\endgroup$
    – Luciano
    Jul 29, 2021 at 14:37
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    $\begingroup$ I am sure - but I like it more that way 🤗 $\endgroup$
    – Chris
    Jul 29, 2021 at 14:43
  • $\begingroup$ sure - different effects for different purposes :) $\endgroup$
    – Luciano
    Jul 30, 2021 at 8:06

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