Mailing List AE-List@media-motion.tv — Message #63962
From: Byron Nash <AE-List@media-motion.tv>
Subject: Re: [AE] Inverse Square Law for glows
Date: Tue, 17 Apr 2018 18:28:32 +0000
To: After Effects Mail List <AE-List@media-motion.tv>
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So, if I were applying that to say, the blur of a layer, what would be the "distance" variable? I'm stacking several layers with Add transfer modes and variable amounts of blur.

On Tue, Apr 17, 2018 at 2:17 PM Walter Soyka <AE-List@media-motion.tv> wrote:
The inverse square law states that intensity is inversely proportional to the square of the distance from the source. Symbolically:
intensity = 1 / (distance^2)

Doing a little math, when the distance is 1, the intensity is 1. When the distance is 2, the intensity is 0.25. When the distance is 3, the intensity is 0.111. When the distance is 4, the intensity is 0.0625.

walter soyka ▼ keen live 

On Tue, Apr 17, 2018 at 1:46 PM, Byron Nash <AE-List@media-motion.tv> wrote:
Always the consummate salesman Lloyd! ;-) 

I think this was more of an experiment to see if I could do it myself and understand the math a bit better. 

On Tue, Apr 17, 2018 at 1:05 PM Lloyd Alvarez <AE-List@media-motion.tv> wrote:
Oooooorrrr you could just use Real Glow! ;-)

Cheers,
Lloyd

On Tue, Apr 17, 2018 at 12:16 PM, Byron Nash <AE-List@media-motion.tv> wrote:
I'm trying to roll my own setup for a better glow. If I'm trying to follow the inverse square law to do the math, would I half/double the amounts at each iteration? Or square root?


 
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