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How to change the corner radius of a rounded rectangle in After Effects

Here's a really short, mythbusting tip. Recieved wisdom is that when drawing a rounded rectangle mask, once you let go, you can't change the radius. Turns out you can!

In this mini tutorial I cover changing the radius while drawing, altering it afterwards and also show how Shape Layers make this much easier than masks.



Posted by: Graham Quince on Mar 28, 2020 at 11:21:35 am after effects, ae, masks, rounded, corner, radius

Just the tip: How to keyframe a wiggle in Adobe After Effects

This is a common question I see all the time on the forums.  The Wiggle expression is really useful, but there are plenty of times when you want it to start, then fade down or vice versa.  This quick tutorial shows you a really simple way to control the Wiggle values using the Expression Controls effects.

The tutorial also includes how to use the Transform effect so that you can save a Fading (reducing) Wiggle as a preset



Wiggle Expression:

wiggle(frequency,amplitude)

which would be used like:

wiggle(5,150);


Posted by: Graham Quince on Mar 7, 2020 at 11:11:20 am after effects, expressions, wiggle, keyframe

Just the Tip: Making a Twister / Tornado in After Effects using CC Particle World

Here's a quick tutorial showing how you can create a particle Twister in Adobe After Effects, using just the native plugins, mainly Cycore's CC Particle World with a bit of CC Vector Blur too.



I use a set of expressions from a previous tutorial, Linking CC Particle World to a 3D Null in After Effects:





Expressions used for the 3D NULL link:

Position X:

x=thisComp.layer("Null 1").transform.position[0]-thisComp.width/2; x/thisComp.width;

Position Y:

y=thisComp.layer("Null 1").transform.position[1]-thisComp.height/2; y/thisComp.width;

Position Z:

z=thisComp.layer("Null 1").transform.position[2]; z/thisComp.width;

Adding a wiggle in only two directions / axis:

X = wiggle(1,50)[0]; Y=value[1]; Z=wiggle(1,50)[2]; [X,Y,Z]

Project download: http://bit.ly/38nBaBB


Posted by: Graham Quince on Feb 15, 2020 at 10:47:42 am after effects, expressions, particles, cc particle world

Just the tip: "Utimate" guide to looping footage / compositions

I created this tutorial after spotting quite a few posts from people new to AE who didn’t know about the options. Then I started trying to come up with an utlimate, time-saving, plug-and-play expression that would take care of loop compositions for you.

And I succeeded!

(I know, it suprised me as well!)

Here’s the video which takes you through everything and underneath you find the expressions:



Project file: http://bit.ly/36orXbW

Expressions used:
Basic method for Time Remapping: loopOut();

Ultimate method – Time Remapping:
tEnd = timeRemap.key(2);
loopOutDuration(type = “cycle”, duration = tEnd*1.8)

For auto-fading opacity:
t = timeRemap;
tEnd = t.key(2);

OriginalLengthofPreComp = tEnd.value;
CurrentLoopTimeAsPercentofOriginalPreComp = t*100/OriginalLengthofPreComp;

if (CurrentLoopTimeAsPercentofOriginalPreComp > 10) {
CurrentLoopTimeAsPercentofOriginalPreComp*10;
} else if (CurrentLoopTimeAsPercentofOriginalPreComp > 90) {
linear(CurrentLoopTimeAsPercentofOriginalPreComp,90,100,100,0)
} else {
100
}


Posted by: Graham Quince on Jan 25, 2020 at 11:36:21 am looping, cycle

Just the tip: White balance, scale and focus reference card for easy compositing

Here’s a short tutorial and giveaway of a digital (and physical) asset I use to help me composite greenscreened actors and CGI elements into a physical scene. This tutorial covers using the reference cards in Adobe After Effects, Video Copilot Element 3D and the included Lumetri Color, Camera Lens Blur and Match Grain effects.

I demonstrate how to composite the free Star Wars BB-8 model from VC’s Star Pack into a regular shot.



Download: http://bit.ly/2RYb1V0

Video Copilot Star Pack: https://www.videocopilot.net/blog/2016/05/free-star-wars-model-pack/

——————————————————————————————————————-

Expression used to roll BB-8:

diameter=100;

pi=Math.PI;

circumference=diameter*pi;

rot=360/circumference;

Xpos=thisComp.layer(“Element NULL”).transform.position[0]*-1;
scalePercent=thisComp.layer(“Element NULL”).transform.scale[0]/100;
rot*Xpos/scalePercent



Just the tip: Free tracking images for tablets and phones for easy screen replacement

Here's a giveaway for anyone interested in trying to do a screen replacement for their iPad, iPhone, Tablet or phone.

After a lot of trial and error, I've created these two images which makes it much easier to track your screen using After Effects and Boris Mocha. The video has a brief tutorial showing how to use the included Boris FX Mocha plugin for After Effects CC.




Official Boris Mocha tutorial:





Downloads:

iPad / Tablet: http://bit.ly/2JiTylb
iPhone / Smart phone: http://bit.ly/35Z9Qcx
(Files are hosted on Dropbox, and shouldn't require signing up to view and download)


Posted by: Graham Quince on Dec 21, 2019 at 11:35:31 am after effects, tracking, boris

Makin' Planets - Adding an atmosphere using Video Copilot Element 3D

By special request, here's an extra Makin' Planets tutorial, where I don't use Video Copilot's free Orb plugin to make a planet but instead use Element 3D to add an atmosphere.   Most of the time, Orb is the best approach for planet making, but if you need to add other 3D objects, you might want to use Element for your globe.  And Element doesn't come with a "add atmosphere" setting.  This tutorial shows you how to create a material that behaves like an atmosphere.



Project file: http://bit.ly/2pNBf12


Posted by: Graham Quince on Nov 23, 2019 at 11:30:50 amComments (1) Video copilot, planet, element 3d, atmosphere

Just the tip: Linking CC Particle World to 3D Null

Here's a quick tutorial to help you make the most of AE's built-in particle system. CC Particle World works in 3D space, but it’s coordinate system is different the rest of After Effects. Use the expressions below to solve that problem by adding them to the Producer settings.



Expressions:
Position X:
x=thisComp.layer("Null 1").transform.position[0]-thisComp.width/2;
x/thisComp.width;

Position Y:
y=thisComp.layer("Null 1").transform.position[1]-thisComp.height/2;
y/thisComp.width;

Position Z:
z=thisComp.layer("Null 1").transform.position[2];
z/thisComp.width;


Posted by: Graham Quince on Nov 9, 2019 at 5:40:23 pm Cc particle world, particles, 3D

Just the tip: Hologram / Projector beams in After Effects without plugins

There's loads of "how to make a hologram" AE tutorials on YouTube, but they all seem to miss out the beams from the projector. This mini-tutorial shows you how to use CC Radial Blurs and Expressions to achieve responsive, changing beams of light.
--------------------------------------------------------------------------------------
Expression used:
L = thisComp.layer("Emitter");
L.toWorld([thisComp.width/2-transform.position[0],thisComp.height/2-transform.position[1],0]);

--------------------------------------------------------------------------------------
Project File: http://bit.ly/2UhFzjG



Posted by: Graham Quince on Nov 2, 2019 at 4:07:33 pm Expression, radial blur, hologram, projector

Just the Tip (a new set of mini-tutorials for After Effects) - Rolling a ball using Expressions

I'm currently prepping a much larger series of tutorials, but to take a break from those, I've also be creating a series of short tutorials for the things I go back to again and again - but not so frequently that I have them memorised. I find myself searching the internet (and the Cow of course) for these tips, but then often have to wade through a 30 minute tutorial - just to find that one thing... that one trick. Well, these mini-tuts are built for that purpose. I hope you find them useful.

This tutorial uses an expression to calculate how much a circle / image should rotate based on its horizontal position. I've then adapted the expression slightly to help you roll 3D objects too.




--------------------------------------------------------------------------------------
Expressions:

2D Layer
diameter=width;
pi=Math.PI;
circumference=diameter*pi;
rot=360/circumference;
Xpos=thisLayer.transform.position[0];
scalePercent=thisLayer.transform.scale[0]/100;
rot*Xpos/scalePercent


CC Sphere in one dimension:
diameter=effect("CC Sphere")("Radius")
pi=Math.PI;
circumference=diameter*pi;
rot=360/circumference;
Xpos=thisLayer.transform.position[0];
scalePercent=thisLayer.transform.scale[0]/100;
rot*Xpos/scalePercent


CC Sphere coming towards camera:
diameter=effect("CC Sphere")("Radius")
pi=Math.PI;
circumference=diameter*pi;
rot=360/circumference;
Xpos=thisLayer.transform.position[0];
scalePercent=thisLayer.transform.scale[0]/100;
rot*Xpos/scalePercent*-1

Project file: http://bit.ly/2ZtSDn6

-------------------------------------------------------------------------------
Twitter: https://twitter.com/ShiveringC


Posted by: Graham Quince on Oct 12, 2019 at 3:39:27 pm after effects, expressions, rolling, roll, rotate

1 2 3


Here you'll find a bunch of tutorials for using After Effects (mainly). I have a YouTube channel, called ShiveringCactus (long story - not funny anymore) where I post the videos.


Archives:

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expressions (9)
after effects (7)
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