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Terragen 4 R&D - cloud turntable 002

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Published on Jan 1, 2016

This is a test of Terragen 4's new light scattering model for clouds. Dense clouds of water droplets scatter light many times, absorbing almost none of the light as it is scattered. This gives rise to phenomena such as bright cloud centres that contrast with dark edges (especially when the sun is behind the camera) and interreflections between masses of cloud at scales both large and small. Terragen 4 can produce these results by simulating multiple scattering much more precisely than Terragen 3. The clouds are also lit by the surrounding atmosphere, which in this video shows up as blue in the shadows. Terragen 3 could approximate this too with GI, but the new model in Terragen 4 shows real detail and self-shadowing of the environment lighting in the areas that the sunlight doesn't reach, and these areas would appear more flat in Terragen 3. The "silver lining" effect which is strongest when the clouds are back-lit is also much better than before.

http://terragen4.com

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