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Physical Sky in Twilight Render

Posted: Sun Nov 29, 2009 5:20 pm
by Fletch
Physical Sky is the default sky in Twilight Render. In order to use it, just leave the sky alone and render your scene.

If you open SketchUp, build a model, set your time of day and location inside of SketchUp (or just leave it to default SketchUp setting) and hit render, you will be seeing the Twilight Render Physical Sky which is based on an actual mathematical model developed for the specific purpose of representing a physical sky.

Sun color will change with time of day if you leave the sun to the default WHITE.
Sun shadows will change their softness with time of day if you leave the Sun slider to default of 50. In these examples, the Sun Slider has been set to "7". This setting renders much more quickly than the default very soft shadow setting of 50.

Physical Sky means that as the time of day and location on earth change, the sky itself will appear differently depending on the situation. Sometimes this difference will not be immediately apparent and sometimes it will be drastically different.

Here are a few scenarios as example: (each rendered on Low+) You can download the test model for this scene here.