OpenPlant Modeler Help

Light Manager Dialog, Properties - Solar

Contains controls for adjusting the Solar lighting, which simulates light from the Sun. The settings will vary depending on the type of light source selected.



Solar properties - Details tab



Solar properties - Solar Position tab with Type set to Time & Location



Solar properties - Solar Position tab with Type set to Direction



Solar properties - Volume Effects tab

SettingDescription
On If on, the light source is active.
Lux Displays the value for the brightness of the Sun with the current settings. If the Sun would be below the horizon, then “No Sun” displays.
Intensity Sets the brightness of the Solar lighting from 0 (no Sun) to 100 (full Sun).
Details tab > Color type Option menu that lets you select the type of color used.
  • User Defined — Lets you set the color of the Sun manually, via the Color setting, or automatically via the Temperature setting.
  • Physically Based — Color of the Sun is computed based on factors such as its position in the sky, air quality, and cloudiness.
Details tab > Color (Color Type set to User Defined only) Sets the color of the Solar lighting. Clicking on the color swatch opens a color selector dialog, which is similar to the True Color tab and Color Book tab of the Active Color dialog.
Details tab > Temperature (Color Type set to User Defined only) Option menu that lets you assign a color temperature to Solar lighting. Where a color is chosen manually, with the Color setting, Temperature is set to Custom.
Details tab > Shadow If on, shadows are generated by the Solar lighting. Sharpness of the shadows is controlled by the Shadow option menu, which determines the number of samples used to calculate the shadows.
  • Sharp — Number of samples — 1
  • Soft - Coarse — Number of samples — 16
  • Soft - Medium — Number of samples — 64
  • Soft - Fine — Number of samples — 160
  • Soft - Very Fine — Number of samples — 256
  • Custom - Lets you define number of samples.
Details Tab > Spread Angle Defines the softness of the shadows. Higher values will result in softer shadows.
Details Tab > Shadow Density Sets the density of clouds in the sky. Value can be adjusted with the slider.
Details tab > Cloudiness Sets the cloudiness of the sky. Values may be input in the field, or adjusted with the slider.

Can vary from Clear (0) to Cloudy (100).

Details tab > Air Quality Sets the purity of the air.

Can vary from Perfectly Clean (0) to industrial (5).

An option menu provides a choice of commonly used settings.

Solar Position tab > Type Option menu that lets you select how the location of the Sun is calculated.
  • Time & Location — Lets you set the direction of the Sun by specifying a time and location on Earth.
  • Direction — Lets you set the direction of the Sun by vectors or by Azimuth and Altitude settings.
Solar Position tab > Set Solar Date icon


(Type set to Time & Location only) Lets you select a date from a Calendar dialog.
Solar Position tab > Set Solar Time icon


(Type set to Time & Location only) Lets you input a time.
Solar Position tab > GMT Offset (Type set to Time & Location only) Displays the GMT Offset value for the location. This can be set manually, or you can use the Select Offset By Zone, or the Select Position By City options both of which include the GMT Offset for the selected zone or city.
Solar Position tab > Select Offset By Zone icon


(Type set to Time & Location only) Lets you select from a pop-up list box, predefined GMT Offset settings for specific zones.
Solar Position tab > Daylight Savings If on, a one hour allowance is made in the time setting.
Solar Position tab > Latitude (Type set to Time & Location only) Sets the latitude at the model's location.
Solar Position tab > Longitude (Type set to Time & Location only) Sets the longitude at the model's location.
Solar Position tab > Select Position By City icon


(Type set to Time & Location only) Lets you select from a pop-up list box, predefined latitude, longitude, and GMT Offset settings for specific cities.
Solar Position tab > Get Latitude Longitude from Google Earth icon


(Type set to Time & Location only. Requires Google Earth to be installed) Launches Google Earth, if not already running. You then can place the pointer at the required location in Google Earth and <Shift+Click> to send the latitude and longitude settings back to the Solar Lighting settings in the Light Manager dialog.
Solar Position tab > Get Latitude Longitude from KML file icon


(Type set to Time & Location only) Opens the Select Google Earth Placemark dialog, which lets you select a KML or KMZ file that contains one or more placemarks. The first placemark contained in the selected file is used to determine latitude and longitude values for Solar lighting.
Solar Position tab > True North Direction (degrees from X axis) Lets you define the direction of true north relative to the X axis.
Solar Position tab > Vector X, Y, Z (Type set to Direction only) Specifies the direction vector from the solar light.
Solar Position tab > Azimuth (Type set to Direction only) Sets the azimuth direction of the solar light (from 0-360). Azimuth values may be keyed in, or you can use the settings window below to interactively set the direction by clicking the compass at the required direction, or clicking and dragging the indicator as required.
Solar Position tab > Altitude (Type set to Direction only) Sets the angle of the Sun above the horizon (from 0-90). Altitude angle values may be keyed in, or you can use the settings window below to interactively set the altitude by clicking and dragging the indicator to the required altitude setting.
Volume Effects tab > Volume Effects check box If on, volume effects are calculated for Solar lighting.
Volume Effects tab > Samples Controls the accuracy of the volumetric effect underneath shadowing objects. Increasing the samples value improves the accuracy.


Samples set to 40 (left) and 200 (right)

Volume Effects tab > Scattering Controls the amount of light scattering which occurs inside the volume. Higher values result in more scattering.


Scattering set to 10% (left) and 80% (right)

Volume Effects tab > Light Intensity Controls the intensity of light inside the volume. Higher values result in more intense light.