Setting items for applying 3D rotation expressions

Updated: 06/25/2024

This section describes in detail the effect of each setting item when adjusted.

Camera position (3D rotation)

The [Camera position] setting determines how the image will look when rotated in 3D space.
It is affected by the perspective strength, described below. The greater the perspective strength, the greater the change in appearance due to the change in camera position.
The figure below shows the change in the rightward keyform when the camera position is changed (the X symbol is the camera position).
Moving the camera position to the left gives the appearance of going around to the side of the object.

Change in keyform facing right when camera position (X) is changed

Center of rotation (3D rotation)

[Center of rotation] is the center setting for rotating the object in 3D space.
Specify X and Y in canvas coordinates. Z is on the canvas (fixed at 0).
The figure below shows the movement when the center of rotation is placed on the right and left sides of the canvas.
The further away from the center of rotation, the greater the rotational movement.

Center of rotation is on the right side of the canvas	Center of rotation is on the left side of the canvas

Offset in Z direction (3D rotation)

[Offset in Z direction] specifies how much the depth of the object should be shifted in the Z direction.
The shifting procedure is performed before rotation.
If depth estimation is used, it is performed for the estimated depth.
By changing this setting, rotation can be expressed as floating forward or retracting backward from the center.

The figure below shows the motion when the center of rotation is set to the center of the object and the offset in the Z direction is positive and negative.
A positive offset in the Z direction gives the object the appearance of floating in the foreground.
Conversely, a negative offset in the Z direction gives the object the appearance of being pulled back.

When the center of rotation is set to the center of the object and the offset in the Z direction is positive	When the center of rotation is set to the center of the object and the offset in the Z direction is negative

Perspective strength (3D rotation)

The [Perspective strength] setting specifies the perspective after the image is taken.
Increasing the perspective value increases the distortion after rotation and gives the appearance of a closer camera.
A perspective value of 0 gives the appearance of a parallel projection.
The figure below shows the change in rightward keyform as the perspective strength is increased from 0.
Increasing the intensity of the perspective will emphasize the difference in appearance between the foreground and background.

Change in rightward keyform as the perspective strength is increased from 0 to larger.

The figure below also shows the different appearance of the rotation with different perspective strengths.
When the perspective strength is 0, the rotational movement is modest, but when the perspective strength is 100, the movement is more dynamic.

When the perspective strength is 0	When the perspective strength is 100

Angle range (3D rotation)

The [Angle range] setting specifies the limit range of rotation.
Larger values give the appearance of greater rotation.
The value specified here is the angle of the minimum or maximum value, whichever is farther from the default value, with the default value of the parameter as the front.

The figure below shows the change in the rightward keyform as the angle range is changed.
Larger values give the appearance of greater rotation.

Change in rightward keyform when changing the range of angle.

Rotation method (3D rotation)

The [Rotation method] setting specifies the rotation calculation method. It mainly affects the appearance of the four corners.
The figure below shows the difference in appearance of rotation for the values of [X-direction – Y-direction in order], [Y-direction – X-direction in order], and [X/Y-directions simultaneously].

X-direction – Y-direction in order	Y-direction – X-direction in order	X/Y-directions simultaneously

Bilaterally symmetrical/Vertically symmetrical (3D shape)

The “Bilaterally symmetrical” and “Vertically symmetrical” settings for depth estimation can be used for warp deformers to automatically make the estimated depth symmetrical.
Simply shape one side with keyform editing to create a bilaterally symmetrical or vertically symmetrical 3D surface.
The figure below shows the result of depth estimation with [Bilaterally symmetrical] enabled.
Simply make a keyform edit on the right (left) side of the warp deformer, and the other side has the same depth.

The result of depth estimation with [Bilaterally symmetrical] enabled.