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Forums Adobe After Effects Light house effect – null connected to a center properties of Fast Radial Blur

  • Light house effect – null connected to a center properties of Fast Radial Blur

  • Enginn Heima

    September 15, 2020 at 11:22 am

    I’m following one of Andrew Kramer’s tutorials called <yt-formatted-string force-default-style=””>Advanced 3D Light Rays in After Effects! </yt-formatted-string>

    Interesting indeed. One thing I can not get my head around is how to make my light source rotate in place. My light source follow the null object x,y and z position since the radial blur center position has been pick whipped with the position of the null. But how can I make the light rotate in place. It’s a light house effect I’m after and the light should turn with the light source 360 degrees.

    Thanks for any suggestions!

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  • Filip Vandueren

    September 15, 2020 at 7:20 pm

    you’ll have to create some distance between your radial blur center and the ball of light.

    For example like this:

    create a 3D null at the centre of the comp.

    create a 2D super-white circle in the center of the comp.

    make an adjustment layer with CC Radial Blur and give the centre this expression:

    l=thisComp.layer("Null 1"); l.toComp([500,0]);

    Now if you rotate the Null, the center of the Radial blur will not be from the anchorPoint of the Null, but from a point 500 pixels away: this point will appear to circle in 3D, shining the light to different directions.

    Of course it’s just a 2D illusion, not actual 3D raytracing, so it is hard to get a sense of shining forward vs shining backward. The only way to do sell is by looking a bit from the top or the bottom, a,d/or animate the brightness of the shapelayer.

    See example

  • Enginn Heima

    September 16, 2020 at 9:16 am

    Thank you Filip!

    I will definitely try this out today and tell you how it goes!

  • Michael Szalapski

    September 17, 2020 at 1:50 am

    If you have Trapcode plugins from Red Giant, Lux does exactly this.

    If you don’t, Nebula from Video Copilot also does this (and a whole bunch more), but it’s not out yet and no idea when it will be.

    So, in the meantime, Filip’s suggestion is the way to go. Smiley

  • Enginn Heima

    September 17, 2020 at 5:46 am

    Thanks Michael. I will also look into Trapcode’s Lux. Do you think the results would be any better than Filip’s suggestion?

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