Shade 12. Light
From ShadeCamp
Contents |
Creating Lights
Point Light
Point Light represents a small light such as a light bulb.
1 From Toolbox, select Create > Light/Camera > Point Light.
2 Drag to create a point light. The radiation intensity (brightness) depends on the amount of dragging.
3 The following shows the result of applying ray tracing to the space incorporating the floor and two walls.
- Point Light Placement
- Result of Ray Tracing
Spotlight
Spotlight is achieved by limiting the irradiation angle of the point light.
1 From Toolbox, select Create > Light/Camera > Spotlight.
2 Drag to create a spotlight.
The spotlight casts illumination in the drag direction, with the radiation intensity (brightness) depending on the amount of dragging.
3 The following shows the result of applying ray tracing to the space incorporating the floor and two walls. You can apply a softness to the space.
Directional Light
Directional Light reproduces a light that mimics a light at a considerable distance, such as the sun, or whose rays are parallel and non-divergent, such as a laser pointer.
1 From Tool Box, select Create > Light/Camera > Directional Light.
2 Drag to create a directional light. The directional light casts illumination in parallel to the drag direction.
3 The following shows the result of applying ray tracing to the space incorporating the floor and two walls. You can apply a softness to the space.
Distribution Light
With the Professional version, you can create a Distribution Light that reproduces the amount of irradiation from an actual lighting fixture. You can download distribution light data (IES) from the lighting fixture manufacturer and so on.
1 From Toolbox, select Create > Light/Camera > Distribution Light.
2 Drag the Viewport to create a distribution light. The distribution light casts illumination in the drag direction.
3 Select the distribution light data to be used, from the window for selecting distribution light data (IES).
4 The following shows the result of applying ray tracing to the space incorporating the floor and two walls. The way in which the distribution light actually casts illumination depends on the distribution light data which was read.
Ambient Light
Ambient Light is a light that illuminates an entire scene with an even degree of brightness. Ambient Light reproduces light that is evenly reflected in all directions in the same way as when light is scattered by particles of air in the atmosphere.
1 From Tool Box, select Create > Light/Camera > Ambient Light.
2 Drag the Viewport and create an ambient light.
3 The following shows the results of applying ray tracing to the space incorporating the floor and two walls. Only the brightness and colors of the ambient light are reflected, rather its scale and position.
Linear Light
Linear Light reproduces a light consisting of a line with a certain width (length).
1 From Tool Box, select Create > Light/Camera > Linear Light.
2 Click or drag the Viewport to create a line object that will become the linear light. Create the line object in the same way as any other line object.
3 The following shows the results of applying ray tracing to the space incorporating the floor and two walls.
Area Light
Area Light reproduces a light consisting of a plane of a certain size (area).
1 From Tool Box, select Create > Light/Camera > Area Light.
2 Drag the Viewport and create a rectangle to create an area light. Create the rectangle in the same way as any other rectangle. If you create the rectangle on the XZ plane, the light will be aimed upwards. To aim the light downwards, rotate the rectangle downwards. Alternatively, reverse the direction of the rectangle from the Flip Face checkbox.
3 The following shows the result of applying ray tracing to the space incorporating the floor and two walls.
TIP
You can confirm and edit detailed light information us-ing the Object Info window. Select a light from Browser and display information on that light. The items that can be edited depend on the type of the light.
For a spotlight
TIP
You can adjust the Point Light, Spotlight, Directional Light, and Distribution Light using the Type popup menu of the Object Info window.
TIP
You can convert a line object into Linear Light or Area Light. To do this, select the line object to be converted into a light and then enter a numerical value for Bright-ness of the Light Attribute group in the Object Info window. You can switch between Linear Light and Area Light from the Type popup menu. You can create an area light from Closed Line having a face.
TIP
Checking the Visible checkbox of the Object Attri-bute group enables Linear Light or Area Light to be rendered.
Using a Distant Light
You can manipulate the direction of Distant Light, which mimics a light at a considerable distance, such as the sun, and which illuminates everything in the scene equally.
1 Click the light direction setting hemisphere in the Distant Light window and set the position of the distant light (1). Switch the reference level of the hemisphere with the View radio button (2).
Brightness Values for Common Light Types
This section provides lumen values for general lights. Select a light. Then, from the Object Info window, set Lumen from the Unit popup menu and set a table value in the Brightness text box.
Point Light, Spotlight, Directional Light, and Distribution Light
Area Light and Linear Light
