Maintaining scale when moving back in Z space

[Bartek Skorupa]

Try this one:

Add an expression to the scale property:

zoom = 1422.22;
transform.scale*(1+transform.position[2]/zoom)

This will work in the composition 1024×576 using square pixels.
To find out what value should your “zoom” have – add a camera to your comp using 50mm preset. In the dialog box that adds camera – change units from millimeters to pixels, and see what zoom value you get. This will be the “zoom” value for your expression.
You don’t even have to really add this camera. Just check the zoom value. You can copy this and paste to your expression.

Bartek Skorupa
Warszawa, Poland

[Bartek Skorupa]

Ok, even better. Just copy the expression below and paste it to your scale:

w=thisComp.width*thisComp.pixelAspect;
zoom=w+w*0.388888;
transform.scale*(1+transform.position[2]/zoom)

This will work for every composition. Adding camera will have influance on the result.

Bartek Skorupa
Warszawa, Poland

[Drewhalasz]

Thanks for the expression!

[Drewhalasz]

Thanks again Bartek.

The expression works except when I add a camera to the comp.

Is there something I need to do once the camera is added?

I’m surprised this question does not come up often. I used the facility to do this in Motion quite often. You could import a PSD file and separate all of the layers in Z space, but maintain the scale. Then you could interact with the layers with a camera.

[Bartek Skorupa]

In this case try this one:

Let’s say that your camera is called “Camera 1”.
Add an expression as follows to the scale property of the layer:

———–

zoom=thisComp.layer(“Camera 1”).cameraOption.zoom;
transform.scale*(1+transform.position[2]/zoom)

———–

This is the same one I gave you in my first reply, but I just linked the “zoom” value to camera’s zoom.

Bartek Skorupa
Warszawa, Poland

[Drewhalasz]

Thanks once again!

Best,
andrew

[Bartek Skorupa]

I’ve just found something like this:

https://aescripts.com/pt_multiplane/

I think you were looking exactly for such solution.

Bartek Skorupa
Warszawa, Poland