Light |
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On/Off Button |
Turn the light source on or off |
Type |
Sets the type of light source to emit:
- Point- Cast light in all directions from the light source
- Spot - Cast light as a cone in a specific direction from the light source
- Area - Cast light from a surface in a specific direction from the light source
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Shape |
(Area Light Only) Sets the Shape from which the light is emitted.
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Color Mode |
Sets the method of coloring for the light.
- Temperature (Kelvin)
- sRGB
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Color |
RGB color of the light source |
Temperature |
The temperature is based on the Blackbody radiation theory where a higher temperature results in a higher energy waveform of light. The color value is automatically calculated based on the temperature and allows for physically accurate environments for white light sources. |
Intensity |
Sets the intensity of the light source in Lumen. |
Illuminance |
(Area Lights Only) Sets the Illuminance of the light source in Lux. |
Attenuation Radius |
Sets the maximum distance light can travel. The intensity of light is interpolated to give a smooth transition once it has reached maximum distance. Note that Attenuation Radius also sets the maximum render distance of an object to a light source when rendering shadow maps. |
Falloff Bias |
Adds a small bias to the interpolation of light intensity when reaching the attenuation radius. |
Inner Radius |
Inner radius of a spot light |
Outer Radius |
Outer radius of a spot light |
Area Width |
(Area Light Only) Sets the width of the light surface |
Area Height |
(Area Light Only) Sets the height of the light surface |
Area Radius |
(Area Light Only) Sets the radius of the light surface |
Cast Shadow |
Make the Light a Shadow Caster
Note: Area Lights are not currently able to cast shadows |
Shadow Mod |
Increases the strength of the shadows based on the modifier value. Be aware that increasing the modifier value to greater than 0 means that you are no-longer using physically accurate shadows. |
Shadow Bias |
The shadow bias is a method to reduce artefacts from shadows. This value should always be above zero for best results, however if the value is set too high, it can start clipping the shadows giving poor results. This is a trial an error value to see what works for your project. Generally 0.15 for Point and Spot Lights gives the best result and so is the default value. |
Shadow Fade Range |
The shadow fade range allows for shadows to slowly fade out instead of clipping after a certain distance. The value is the distance over which the fade out occurs, if this value is out of proportion with the light strength, strange results will occur. By setting this value to 0, the effect is disabled. |
Baked Shadows |
If this setting is checked, the light will skip the shadow calculations and use a baked shadow map instead. This is a method of optimizing performance for light sources which aren’t going to have any moving objects around them. Whenever you disable this setting or change the light Type the baked shadow maps for this light are removed from the project. This is a method of ensuring the project isn’t clustered with unused textures taking up more memory space. |
Bake! |
This button performs the baking operation on the light source. Whenever you change something in the scene you will have to re-bake your shadow maps if you are using this shadow method. The text of this button will turn red whenever a shadow map is missing (ie needs to be baked) |
Baking Resolution |
This sets the resolution the shadow map should be baked at. Note that baking at higher resolutions takes more time and cause Bright Engine to freeze up. If the engine stops responding, simply leave it to finish its task and it will return to normal once its done. Higher resolution shadow maps use up more memory but give more accurate results. |
Max Distance |
Sets the maximum Render Distance the light source is rendered before being ignored. It is good practice to adjust this value to a distance where the effects of the light source will no longer be visible to the camera for optimizing performance. |
Fade Range |
Sets the distance across the model fades in/out. Setting a value to zero will cause the model to simply pop in/out. |
Timeline Mode |
Switches the light to use timeline settings. Timeline settings are adjusted in the Timeline Editor and allow for varying setting values over a period of time such as a variation of color or strength. |
Timeline Editor |
Opens the Timeline Editor. |
Loop Method |
Sets the looping method for the timeline.
- Loop Forward – Loops through the timeline in a forward direction.
- Loop Backward – Loops through the timeline in a backwards direction.
- Ping-Pong – Bounces between the start and end of the timeline in a loop.
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Timeline Length |
Sets the time in seconds over which the timeline loop takes place. |