Light kits are pre-built light models used to light a scene. They give more control over lighting than an ordinary light does.
There are three light kits available, which you can create from the Light Kits sub-menu on the main Cycles 4D menu. The kits are:
The controls for each are similar, with some that are specific to each light. See below for the common options found in all three lights.
Note: these light kits all use an emission material applied to a mesh to emit light. They do not use an actual cyLight object. The main implication of this is that, although they cast shadows in the scene as with any other light, the shadows are not included in the shadow buffer in the real-time preview if you display the shadow buffer using the 'Display Buffer' menu.
Cycles 4D Soft Box
Size X, Size Y, Depth Z
Use these controls to change the size of the soft box. Alternatively, you can use the sizing handles in the viewport.
If checked, the soft box will have rounded corners. The radius of the rounding is controlled by the 'Radius' setting.
If 'Rounding' is checked, this setting controls the radius of the rounding.
Cycles 4D Ring Light
The radius of the light. The width of the light-emitting part is not changed.
You can also use the sizing handle in the viewport to change the radius.
The width of the light-emitting part of the light.
You can also use the sizing handle in the viewport to change the width.
The thickness of the body surrounding the light.
Cycles 4D Spot Light
The overall size of the light. You can also use the sizing handles in the viewport to change the size.
This controls the opening of the 'barn doors' attached to the light.
These options are common to all three light kits.
A link field for a material to apply to the light. A material is created by default when the light is first created, but if you want to use a different material you must drag it into this link field.
Note that this must be an object material using an Emission shader to generate the light - it cannot be an actual Cycles 4D light material.
You can create a new material bly clicking the 'Create Material' button.
Click this button to create a new emission material and add it to the 'Material' link field.
The light's colour.
The brightness of the light.
You can optionally drag a scene object into this field. The light will then rotate to point towards that object.
If you use the 'Target' feature, then when the light rotates to point to the target it may rotate on all three axes. If this switch is checked, it will only rotate on the heading and pitch axes; in other words, it will not bank.