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1. Random Flickering

   

   Topic by jocose · Oct 2010 · Home› Unreal Engine

   I'm trying to get some random flickering to occur on the opacity of my material. Right now i'm using Sin and time to get a "pulsing" effect but I want it to be random. Anyone have an idea of how to set this up? I didn't see a random node.

2. Re: Random Flickering

   

   Reply by Adam L. Gray · Oct 2010 · Home› Unreal Engine

   Ah, when you said random I figured you meant something more like so: and not a fast and constant flicker :p

3. Re: Random Flickering

   

   Reply by cholden · Oct 2010 · Home› Unreal Engine

   Sounds like you got what you want, but I happened to have an example already uploaded. so here it is: http://chrisholden.net/udk-simply_neon2.jpg

4. Re: Random Flickering

   

   Reply by Oniram · Oct 2010 · Home› Unreal Engine

   something ive found a bit "unwanting" with sine nodes is that if you're putting any color into them, they will become inverted. understanding that a sine wave goes from 1 to -1, you'll see the inverted color at the <0 values, or it will end up remaining black or white longer than it should. a bypass for this is to just add…

5. Re: Random Flickering

   

   Reply by Adam L. Gray · Oct 2010 · Home› Unreal Engine

   Yeah, that's from inside unreal, I didn't save it I'm afraid, but I could give you a quick rundown. What I did was basically use the same setup as Chris did there, only, as mentioned in my first post, I used multiple sines instead of one.Each one with their own time interval. Then I used the 'Add' node to add all those…

6. Re: Random Flickering

   

   Reply by jocose · Oct 2010 · Home› Unreal Engine

   is that from inside unreal tiros, and if so could you post your sin wave setup. I'm curious to see how it compares to mine.

7. Re: Random Flickering

   

   Reply by jocose · Oct 2010 · Home› Unreal Engine

   Thanks Chris, That's probably a better way to do it. I'll look into re-doing that part of the material. It's almost done, then I'll post in my hallway post as an update.

8. Re: Random Flickering

   

   Reply by jocose · Oct 2010 · Home› Unreal Engine

   Thanks man, wasn't exactly what I wanted but I manged to get a pretty cool effect this way. Will post my shader for review when I'm done.

9. Re: Random Flickering

   

   Reply by Adam L. Gray · Oct 2010 · Home› Unreal Engine

   Well, you can't get it completely random, I think.. But you can use multiple sines with different time increments, then add them together. Should give a more random'ish result. And should multiple sine's flash simultaneously, giving a 1+ strenght to your constant output or whatever we should call it be a problem, then a…