Spot light halo? Where did it go?

calpgrmr · April 3, 2021, 10:30pm

Hi. I’m at 2.82.
Where is the “Halo” On/Off for the spot light? (Eevee or Cycles)
Thanks.

moonboots · April 4, 2021, 6:59am

Hello, please be a bit more specific about what you mean by “halo”. In Eevee you can enable the Properties > Render > Bloom option, is it what you’re looking for? In Cycles this option doesn’t exist so you need to do it through the Compositor with Glare node for example (also works in Eevee).

calpgrmr · April 4, 2021, 2:45pm

The spot light in 2.79 had a setting called “Halo”. Where you could see the light go through the air, like in a smoky room/concert.

halo

moonboots · April 4, 2021, 2:50pm

wow ok sorry I never knew that
It was a Blender Internal feature though

Renzatic · April 4, 2021, 2:53pm

You’ll need to use volumes for those. You create a cube that encompasses your scene, give it a material, and assign a Principled Volume node to it. Like so…

calpgrmr · April 4, 2021, 2:57pm

OK. Cool! I’ll give it a try.
Thanks!

calpgrmr · April 4, 2021, 3:38pm

I tried it out, and it is similar but not the same. I’ll keep experimenting!

Again, thank you!

Renzatic · April 4, 2021, 3:44pm

Just make your fog thinner, boost your light, and play with your volumetrics and world settings a bit.

moonboots · April 4, 2021, 4:59pm

you can simply create a cone and use a Layer Weight as factor of a Mix Shader between a Transparent and an Emission node

edit: of course it was meant to be an answer to calpgrmr

Renzatic · April 4, 2021, 5:16pm

That would work. Only problem is it’d only work in Cycles, not Eevee.

edit: Actually, you can do some cool stuff with this…

moonboots · April 4, 2021, 5:21pm

it works with Eevee as well, you just need to enable Alpha Blend and Shadow None in the material settings

Renzatic · April 4, 2021, 5:22pm

Oh yeah…

Excuse my derp moment. Should’ve thought of that.

moonboots · April 4, 2021, 5:24pm

it won’t work fine if you’re in front of the cone but you can create a sphere with the same material that you put at the lamp position in order to still see a light

Renzatic · April 4, 2021, 5:42pm

I added a gradient texture to another transparency node, and got this. It helps with the sudden termination when it intersects with the floor.

moonboots · April 4, 2021, 5:46pm

yes there are a lot of things you can do, like using noise to make it a bit more natural, etc…

Renzatic · April 4, 2021, 5:48pm

I’ll probably end up using this. It’s pretty neat.

moonboots · April 4, 2021, 5:50pm

yes it’s a quick trick to fake bloom, like this (play with the Emission strength if needed). Works fine in Cycles and Eevee and you don’t need to use Bloom or Compositor:

same with noise and displacement:

Renzatic · April 4, 2021, 5:55pm

Quick question. Is there a way to set an object to be ignored by lights in Eevee?

moonboots · April 4, 2021, 5:56pm

not that I know for the moment, except with the Compositor of course, I think it will be implemented soon. Everybody is asking for it and I think I’ve heard Pablo Vasquez talking about it if I’m not wrong (?)

Renzatic · April 4, 2021, 6:00pm

Shame. I tried it out in my most recent scene, and it looks great, save for it interfering with the lights.