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Question by tayloreichhorst · May 24, 2016 at 03:46 AM · lightingsizeemissive

Small objects won't emit light, large ones will. Testing with sphere.

alt text

Emission on this simple sphere will not work unless the sphere is large. Is this normal? This is obviously a problem that is making my life difficult with all of the models I have created. I can't get a light bulb to use emission unless I crank up the size of the model in my scene.

I have looked but can't find any information on how big a model should be before emission works. Is this maybe a problem with my Lighting "Scene" settings that I can't figure out?

FYI All objects set to static, when I change the size of the sphere and bake the lighting I get the results in the image.

Any help is appreciated.

emission.png (370.7 kB)
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Answer by tayloreichhorst · May 24, 2016 at 04:20 AM

Answered my own question. I'll post this in case anyone else has this issue.

In Maya, I do create my model in cm or meters. On FBX export, I left it as Automatic. This brings it into Unity as a 0.01 file scale. Not good. Instead, I take it off automatic and switch it to Meters. This brings the models in at a 1:1 scale.

All good!

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avatar image tayloreichhorst · May 24, 2016 at 05:11 AM 0
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I lied, it worked in theory.. but everything i huge now, and my animated models don't animate correctly when scale factor changes.

I guess you just can't have something that small emit light?

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Answer by Ray-Divisions · Feb 13, 2019 at 12:16 PM

Has this been answered in another thread. I have same issue

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