Physical Sky in Twilight Render

Frequently asked questions about Twilight Render
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Fletch
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Physical Sky in Twilight Render

Post by Fletch » Sun Nov 29, 2009 5:20 pm

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.
Attachments
PhysicalSkyInTwilight.zip
Download this test scene example.
(32.03 KiB) Downloaded 651 times
Ecuador - Summer Evening
Ecuador - Summer Evening
PhysicalSkyExample01_EcuadorSummer.jpg (84.28 KiB) Viewed 10671 times
Ecuador - Winter Evening
Ecuador - Winter Evening
PhysicalSkyExample02_EcuadorWinter.jpg (84.96 KiB) Viewed 10668 times
Hungary - Summer Evening
Hungary - Summer Evening
PhysicalSkyExample03_HungarySummer.jpg (84.83 KiB) Viewed 10661 times
Hungary - Winter Evening
Hungary - Winter Evening
PhysicalSkyExample04_HungaryWinter.jpg (84.73 KiB) Viewed 10664 times
Iceland - Summer Evening
Iceland - Summer Evening
PhysicalSkyExample05_IcelandSummer.jpg (84.66 KiB) Viewed 10664 times
Iceland - Winter Evening
Iceland - Winter Evening
PhysicalSkyExample06_IcelandWinter.jpg (85.34 KiB) Viewed 10664 times

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