Define the light properties: intensity, is the light on or off, color, location, direction and shadows.
Dialog Box Options
- On
- Switch the light on (default) or off.
- Use as shading light
- Switch the feature on or off (default). If you use the light as a shading light, the light appears in the working mode in addition to the rendering mode.
- Name
- You can name the light. It will be easier for you to recognize the light in the object tree and the light table.
- Intensity
- The intensity can have values 0-1. If you change the value, you can see the change of the intensity in the model at once.
- Light falloff
- You can select this property for a point light and a spot light. Select one of the following:
- Constant - Default value. The intensity of the light does not decrease when the distance increases.
- Linear - The intensity of the light is halved when the distance is doubled.
- Square - The intensity of the light is reduced to one quarter when the distance is doubled.
- Light color
- White light is the default. You can define the color in the following ways:
- Enter the color's RGB value in the Red, Green and Blue fields.
- Click the Palette button and click a color in the palette. You can adjust a luminous of a color with the slide switch. Accept the color selection. The selected RGB value of the light color is displayed in the dialog box.
- RGB Color
- Shadows
- Select whether the light creates shadows or not. Edit the variable values of the shadows by clicking the Values button. You can change three variables: resolution, softness and quality. Select a new value from the list or enter a numeric value in the field. Following numeric values are possible:
- Resolution can have a value between 0 and 2048. With resolution 0 the shadows are sharp.
- Softness can have a value between 0 and 5.5.
- Quality can have a value between 0 and 9.
- The best and sharpest image is achieved by using the values Resolution=0, Softness=1 and Quality=9.
- Light cone
- You can select this property for a spot light. Click the Values button, and enter numeric values in the fields. The numeric values are as follows:
- Light cone angle - Defines the angle of the light cone in degrees (angle1).
- Light cone delta angle - Defines the half-light area in degrees (angle2).
- Beam distribution - Defines the distribution of the light beams. With large values such as 8, the light beams are concentrated in the middle of the light cone. With small values such as 0 and below, the light beams are concentrated at the edges of the light cone.
- Light Source and Direction
- You can define the position and direction of a light in different ways, depending on the light type.
- Point light - Click the Position button and select the
position in the model. Point light illuminates spherically in all directions. Its beams begin from the
position point and are evenly distributed.
- Spot light - You can define both the position and direction for a spot light.
First, click the Position button, and click a point in the model. After this, click
the Location button, and click a direction point in the model. The beams are spread
conically from the position point towards the direction point. You can define the properties of the light
cone under Light cone.
- Distant light - Define the position and direction of a distant light by moving the Rotation and Height sliders.
- Rotation is the direction of the incident sunlight. It can be adjusted 0 to 360 degrees around the model. If the value is 0, the direction of incidence is left. Larger values rotate the direction of incidence counter-clockwise.
- Height is the height angle of the light (sun) (-90) 0 -90. When the Height = 0, the sun is at the horizon line. When the Height = 90, the sun is straight above. In Finland (Helsinki), the highest point the sun shines from is about 53.5 degrees at the summer solstice. In practice, lower altitude angles are more useful for rendering.
- If you wish, you can set the position and direction coordinates of the light to zero, in which case the incoming direction of the light is relative to the viewing angle. It is not necessary to edit the incoming direction of a relative distant light, when the viewing angle changes.
- The feature Binding is not used in the Vertex BD application.
- Render
- The model in the working window will be visualized, when you click the button.
- Advanced
- The function opens the Light Edit dialog box in which you can edit the shader properties of the light.
- Light Shading Properties
