Author Topic: jagged/pixelated renders when using area light  (Read 218 times)

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Offline tijs

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jagged/pixelated renders when using area light
« on: February 01, 2019, 04:51:50 am »
Hi there,

I'm fairly new to keyshot but have been having a great time so far!

I have been trying to render some lights by assigning the material "area light" to an object.
It seems that I keep getting these very ugly parts in my render on the edges of the light material.

I have been bumping up the samples to even a 1000 samples but thats clearly not the solution.

Can someone explain and/or help me fix this?

Kind regards,

Tijs

Online Esben Oxholm

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Re: jagged/pixelated renders when using area light
« Reply #1 on: February 01, 2019, 05:45:24 am »
Hi tijs.
Looks like your area light materials are super bright.
What happens if you lower the intensity (by a lot)?

Cheers,

Offline tijs

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Re: jagged/pixelated renders when using area light
« Reply #2 on: February 01, 2019, 06:01:30 am »
Hej Esben,

Thank you so much for your reply, I'ts set by a 1000 lumen by default.
I set it down to 100 and it seems to be a little better but still very grainy smh.

I also liked the effect the bright light had on the bump of the "armature" .

I will upload the image.

resolution: 800 x 512
300 dpi
400 samples

Offline RRIS

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Re: jagged/pixelated renders when using area light
« Reply #3 on: February 04, 2019, 05:07:11 am »
Is the scene/object scale correct?
Check your units (Edit > Set Scene Units..)
Select an object of which you know the size and look at your Project panel under properties if the shown size is correct.

Area lights require your scene to be setup properly.

Next check your materials.. I'm not sure if this influences your lights a lot, but I never use full white for area lights, or as the diffuse color on materials (I typically stick to a max of 85-90% gray).

Offline tijs

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Re: jagged/pixelated renders when using area light
« Reply #4 on: February 07, 2019, 06:18:19 am »
Thanks for your advice!

I notice that in other situations I get the same effect (not only with light situations)

see attached image, maybe its my mapping?

Offline RRIS

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Re: jagged/pixelated renders when using area light
« Reply #5 on: February 07, 2019, 08:58:39 am »
Where in the image with the pink background do you see the problem? I'll admit, your dark material makes it really difficult to see anything :)

I misunderstood your question initially, I thought you had the common 'fireflies' problem, where you have white dots that don't resolve..

If jagged edges are the problem, have you tried rendering with "Custom control", where you can set anti-aliasing and pixel blur?

Offline mattjgerard

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Re: jagged/pixelated renders when using area light
« Reply #6 on: February 07, 2019, 09:34:50 am »
Post the ksp for use to look at, from what I can't see, that's going to be the only way to get some answers. If you can package it and post it here, you will most likely get some better advice.