Light Source Types
Three light source types are available whose position can be modified by manipulators.
The manipulators are only visible if Manipulation Mode is selected in the contextual command. An active manipulator is highlighted.
Spot 
The light of a spot light source is similar to a flashlight. It can be used to tune the lighting of each object individually.
Spot light sources are defined by a direction vector, a light cone, the dehidral angle of which can be modified dynamically.
With Angle and Sharpness in the Spot Parameter tab you can influence the transition to the environment.
When setting the Angle to 90 deg and the sharpness to 0, a point light source with the same position will result.
High Sharpness values concentrate the light beam in the center of the light cone.
Spot Light Manipulation Modes
Spot light sources can be manipulated as follows:
- Rotate
Rotates the light source using the manipulator at the rear end.
- Move
Moves the light source along the selected axis Moves the light source along the light beam line 
- Change target point
Moves the manipulator at the end of the light beam line.
Point 
Points radiate light of a light source symmetrically into all directions (like a plain light bulb). The light beams have different wave angles on a determined plane.
Point Light Manipulation Modes
Point light sources can be moved along the axes of the model
coordinate system.
Direction 
Beam light sources produce parallel light from a constant direction (like sunlight). The wave angle on a determined plane is constant.
Direction Light Manipulation Modes
The direction light source can only be rotated. Via the context menu, the following modes can be activated for the rotation:
- Rotation Free
Free Rotation on a Circle Rail Free Rotation on a Spherical Path The light source is moved along one of two circular rails lying in two perpendicular planes.
The active rotation manipulator is highlighted and the associated motion rail displayed.
This manipulation mode allows a 'real' free rotation, i. e. the light source can be moved on an arbitrary path on a sphere. This way a fast alignment of the light source is possible.
The manipulator is activated by moving the pointer onto the intersection point of the rotation manipulators.
Notes:- The manipulator at the intersection point of the rotation manipulators is not visible.
- Both rotation manipulators are highlighted.
- No motion rails are displayed.
Alignment of the Rotation Manipulators in the Rotation Free Mode The circular manipulator to align the rotation manipulators is located in a plane whose normal is the light direction. Its center point is close to the intersection point of the rotation manipulators.
The alignment manipulator is activated when the pointer is moving over it.
When rotating the manipulator around the light source direction, it modifies the planes in which the rotation manipulators reside.
Rotation manipulator before alignment Activated alignment manipulator can be
rotated with left mouse button pressed
until the rotation manipulators are aligned.
Modified planes after the alignment is finished Rotation manipulator after alignment 
- Rotation around X/Y/Z
- The light source rotates either around the global X, Y, or Z axis or an axis perpendicular to the defined axis.
- Rotation around Robot
- Allows rotating the light source either around the current Robot Z direction (W) or around an axis which is perpendicular to the Robot Z direction.
- The light source rotation axes can thus precisely
be aligned at geometrical objects.
Rotation of the Light Source Around
the Local Robot Z Axis (W)
Rotation of the Light Source Around the Axis
Perpendicular to the Local Robot Z Axis (W)
