Emission Shader not Emitting Light?

Hello,

This pillar should emit a pink light -- the emission property works fine it seems. However, the wall behind it and the floor around it, doesn't seem to be getting any light. None of the objects are set to Lightmap Static and the pillar Emission is set to Dynamic Lightmaps.

I've switched the settings around to see if I could elicit a different result, but found no change.

Am I missing something to activate the emissive light?

 

Thanks -- that's how I had them set at the start, though, and again switching them back doesn't seem to change the emission. I've tried a bunch of combinations -- is there something on the emissive object, static or not, or the settings by the emissive selection in the shader?

 

Crank emission really high up. You might want to up the cluster res a bit too in the lightmap parameters for the pillar.

 

I've had it set to 22. Putting it to 3000 doesn't add any light emission. All the other lights are off, so I would probably see something if there was just a little being emitted.

I'm not sure what the cluster resolution is, however.

 

With the pillar mesh selected, go Lightmapping -> Object. Add a new lightmap parameters, click edit, then inspector, then crank up cluster res to 1 see if that helps (it might not)

 

Didn't seem to do anything :/ However, that was also baking stuff it looked like? I'm hoping the light will be dynamic, since I'm having it pulse in and out.

 

You have things set up as lightmap static, right?

Try removing the texture you have in emission and just use a color as a test.

 

What change should I expect to see? I mean -- it's not emitting light, but without the emission texture, it still won't emit light.

The texture definitely shows up -- I have it scripting to pulse in and out, and it works visually as expected.

 

Remove the emission texture and just put in a color. It should emit light then.

 

Set the objects to Static, its at the top of the inspector. Lightmap Static, specifically.

Er, just noticed you want it to pulse.. Haven't got into Dynamic objects yet.

 

It can pulse, even if it is static.

We have to make it emit light first though.

 

OH. OK. So the solid color worked. However, my pulsing code (which included a color) seems to break the light. WIthout the code, the pillar stays lit and emissive.

However, I've added the texture back in. At 400 the light is *barely* visible (which is why at 25 I thought it just wasn't working). I have to get it up to 50000 (!) in order to get the light I want, but then the texture is kind of silly looking, as the lines that are glowing are just crazy.

 

About the pulsing, I actually think it might be broken for beta9.

(it will probably be fixed very soon though)

*cough*

About light not being enough, maybe see if the increased clustering helps (it miiiight), also raise the Global Illumination Slider in lightmapping a bit.

 

I guess I"ll just have to wait to get this effect then. Raising GI in Lightmapping helps, but not enough to allow a normal look to the object as well as actual light being emitted. Plus, changing that would affect other things in a negative way, so I don't' really want to do that.

 

They could have a light multiplier on the actual shader that doesn't effect the actual appearance.

Maybe it's something that should be feature requested.

 

I had a similar problem with weak emission but it got solved when I set everything to be in linear color space. Try to double-check that

 

What I would generally first check in such cases is the "GI - Emissive" scene view mode. That shows emission (in realtime lightmap space) that we pass to Enlighten for realtime GI. For realtime GI emission is currently rasterized at half the realtime GI resolution, so if you have fine detail in your emissive texture it might get lost.

If you change the texture to white (or just remove it) do you get the expected result? If so, try to experiment with the resolution on the pillar (by providing another lightmap params asset in Lighting > Object tab) and use the "GI - Emissive" view to debug.

Increasing the size of the pink lines (their area relative to non-emissive parts) is also an option.

 

The shot here on the left is just white in the emissive property, no texture. The one on the right is my texture, with a custom light map parameters with the GI all up to 5.

I guess I just expected the amount of light to be greater than it's putting out? Even the white -- with that pure white beam, it seems like not much light is being produced.

 

Is the light value tied directly to the texture, or is it possible to somehow override the amount of light being emitted without changing anything else?

 

Is there aleady any docs about the GI baking parameters window?