Category: Instructions

How to set the ending or starting keyframe value in an Expression Control in After Effects?

To set ending keyframe value:

[code]

if (numKeys > 1){
newV2 = comp(“DECAY”).layer(“Grass Controls”).effect(“Wind Speed”)(“Angle”);
v1 = valueAtTime(key(1).time);
v2 = valueAtTime(key(2).time);
linear(value,v1,v2,v1,newV2);
}else{
value
}

[/code]

 

To set starting keyframe value:

[code]

if (numKeys > 1){
newV2 = comp(“DECAY”).layer(“Grass Controls”).effect(“Wind Speed”)(“Angle”);
v1 = valueAtTime(key(1).time);
v2 = valueAtTime(key(2).time);
linear(value,v2,v1,newV2,v1);
}else{
value
}

[/code]

 

Reference:

Expression to Control a Single Keyframe’s value

How to start or stop wiggle at specific time in After Effects?

Use time or frames to start i.e.:

frameToStart = 39;
if (timeToFrames() > frameToStart)
{ wiggle(2, 500);
} else {
value;
}

That starts at frame 39.

 

or

 

timeToStart = 1;
if (time > timeToStart)
{ wiggle(2, 500);
} else {
value;
}

 

that after 1st second.

Reference:

How To Start And Stop Wiggle In After Effects At Specific Time

 

How to pickwhip and position bulge center in After Effects to skinny legs?

  1. create a null layer
  2. then use motion tracker track 1 point
  3. apply X and Y to null layer
  4. Create new BULGE effect in a new Adjustment Layer
  5. alt+click the Bulge Center timer icon
  6. in the expression area, select the pickwhip icon, and select the Null’s position, that’s it!

Reference:

Help getting distort->bulge to follow motion tracking? from AfterEffects

How to fix or make a perspective image flat in Adobe Photoshop? And how to do a screen replacement in After Effects?

  1. Edit > Perspective Warp.
  2. Draw the plane/corners
  3. Switch to Warp
  4. Redraw a flat plane to map the image correctly.

Reference:

https://helpx.adobe.com/photoshop/using/perspective-warp.html

 

Screen replacement video:

How to show track points for selection for 3D Camera Tracker in After Effects 2020?

How to show track points for selection for 3D Camera Tracker in After Effects 2020?

 

View > Show Layer Controls

 

Reference:

https://community.adobe.com/t5/after-effects/after-effects-3d-camera-track-can-t-select-track-points/td-p/5959152