Trapcode Form

Base Form Group

The Base Form group defines the original particle grid – called a 'Base Form' – that can be affected by layer maps, particle controls, dispersion fields and every other control in Form 3. You have control over the size, particle density, position and rotation of the base form in 3D space.

1st

Base Form

A VERY IMPORTANT control that sets the starting point of your form. All of the base shapes can have multiple copies by setting Particles in Z to a value greater than 1.

2nd

  • Box – Grid: Generates a grid of particles.
  • Box – Strings: Generates a dense set of horizontal strings.
  • Sphere – Layered: Generates concentric spheres.
  • OBJ Model: Specifies using an OBJ file in your Timeline. The OBJ Settings group is where you choose the specific file.
3rd 4th
5th 6th

Top left: Grid. Top right: Strings. Bottom Left: Sphere Bottom Right: OBJ Forms 
The OBJ example is the PL_Glasses2 file, which can be accessed via the Designer.

Size X, Size Y, Size Z

Sets the size of the form in the X, Y and Z axes. The X and Y dimensions correspond to the size of the form horizontally and vertically, while the Z value determines its depth. Size Z and Particles in Z work together to control the density of the overall form.

 7th 8th

At left, Size X at 400, Size Y at 250, Size Z at 1700.At right, Size X at 1200, Size Y at 300, Size Z at 800.

Particles in X, Particles in Y, Particles in Z

Sets the number of particles used to generate the form along the X, Y and Z axes. Render times are directly proportional to the number of particles. Often a particle density of only a few hundred is needed to clearly define a form.

Be careful of high Z values, because the Z value essentially replicates the grid, strings, or sphere, and can cause very slow rendering. Typically, you only need a Z value of 1 to create an interesting surface shape.

9th 10th

Left to right, Particles in X at 300 and 800.

Center XY, Center Z

Positions the form in space. Note that this positioning takes place BEFORE the different distortion fields (Fractal Field and Spherical Field) are applied, so the controls here in effect move the form through the fields. If you'd rather move the whole thing with fields applied, use the Offset settings in the Transform World controls instead.

X Rotation, Y Rotation, Z Rotation

Rotates the form in 3D space. This rotation takes place BEFORE the distortion fields (Fractal Field and Spherical Field) are applied, so these controls in effect rotate the form through the fields.

If you would rather rotate the whole form with fields applied, use the Rotation settings in the Transform World controls instead.

11th 12th
Left to right, X Rotation is 0 and 100.

String Settings group: When you choose Base Form> Box – Strings, these settings are enabled. Go here

OBJ Settings group: When you choose Base Form> OBJ Model, these settings are enabled. Go here