How To Make a LIGHT FLICKERING FX with MAYA & ARNOLD

Welcome to my channel, I’m Alex aka Skart™ and I'm an Art Director & CG Artist working in the VFX/CGI industry.
Today we will see together how to make a neon flickering fx
inside maya with the mighty Arnold Render. Happy watching!
And subscribe for learn more about VISUAL EFFECTS, CGI and CINEMATOGRAPHY.
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If you're reading this, make sure to click the thumbs up button because it makes me smile!
Thanks for watching!

[@akshay1654]

ty

[@PrimalVFX]

You're welcome @Akshay ! Glad you've liked the video.
Here's the script with the time gap. I've just finished to write it right now, because it was interesting how to implement the time gap. ;)
So just copy the code below and read the comments.
// Get the current time
int $varCurTime = `currentTime -query`;
// Range for the exposure
// Variable declaration
float $varExposure;
// Random function, range from 0 to 10 of exposure
// So change here for expo value
$varExposure = rand(0,10);
// Time gap between change of exposure value
// Variable declaration
float $varTimeGap;
// Numbers of frames
// change here for gap between change
$varTimeGap = 5;
// Final expression
// Change "aiAreaLight1" with the name of your light
if(fmod($varCurTime,$varTimeGap)==0) { aiAreaLight1.aiExposure = $varExposure; }
Good luck with your project!

[@akshay1654]

@@PrimalVFX wow❤️ thanks a lot, you helped me the right time🫂

[@PrimalVFX]

you're welcome ;)

[@Michael-eb9vq]

Thank you, I love the way that you teach fast without wasting time.👍

[@PrimalVFX]

Hi Michael, thank you it's much appreciated!

[@nothingness644]

Boom boom bam straight to point

[@PrimalVFX]

Thank you very much! Glad you have enjoyed the video ⚡👍

[@nothingness644]

@@PrimalVFX its showing me syntax error 🤔

[@PrimalVFX]

@Nothing Ness try to copy the code in the pinned comment. I think you make an error or something. It's strange.

[@nothingness644]

@@PrimalVFX Thanks i made it can i also use this exppresion in other lights like point and others

[@nothingness644]

@@PrimalVFX Actually i am trying to make obliesk kinda thing in which i want it to flicker a light

[@redcocktail]

Dope! Thanks for the sweet tut. 👌

[@PrimalVFX]

Thank you mate for watching it ;)

[@bumper6426]

Baam, thanks for this video !

[@PrimalVFX]

Thank you Bumper for watching!

[@horuszoo8672]

bamm ^^

[@PrimalVFX]

Horus! Thank you for watching, hope you've like it.

[@PIVA974]

Bam :)

[@PrimalVFX]

Here it is! Thanks mate.

[@KipperTD]

I found that these expressions give a more realistic flicker. You can mess around with the exposure noise variables to achieve quicker or slower overall flicker and the intensity for the micro flickers.
aiAreaLightShape.intensity = rand (0,10) *.5 ;
aiAreaLightShape.exposure = noise (time*1) *7 ;

[@PrimalVFX]

Thank you very much for sharing with the community! 🤘⚡

[@KipperTD]

@@PrimalVFX thanks for the tutorial!

[@PrimalVFX]

You're welcome! Thanks for watching 🎥

[@christiangrafe8048]

can you next time please show te final render?

[@PrimalVFX]

yes for sure, I didn't thought at time of making the video that it was necessary (flickering fx). Sorry for that.
By the way, the final artwork of this particular scene is here: www.artstation.com/artwork/oAonbB

[@joliekubinigambula7282]

I can not see the flickering in the arnold Renderview? Is there anyone else having the same issue?

[@PrimalVFX]

Hello! It's a bit strange I'm not sure. When you playback your scene, do you see the exposure of your light changing values? In the attribute editor.

[@christiangrafe8048]

can i key the expression?

[@PrimalVFX]

No, it's a method to avoid using keyframes animation.

[@christiangrafe8048]

@@PrimalVFX oh thats pitty, i wanted to use the flackering fort starting up the light till frame 15 and than stop the flackering. And it was possible to stop the expression using: if (frame

[@PrimalVFX]

Surely there is a way for set-up it with expression/script and add it to my previous code. If I've got time I will look into it to find a solution.