Day-night lighting for models

CesiumGS / cesium

An open-source JavaScript library for world-class 3D globes and maps :earth_americas:

https://cesium.com/cesiumjs/

Apache License 2.0

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Day-night lighting for models #6437

Open lilleyse opened 6 years ago

lilleyse commented 6 years ago

Models are lit based on the sun direction but there's no recognition of a day-night cycle. Two of the problems are:

The sun basically shines through the ground during night, lighting the bottom-facing part of the model
The ambient lighting doesn't adjust to time of day.

Should there be a day-night lighting option on Models/3D Tiles?

Requested on the forum: https://groups.google.com/forum/#!topic/cesium-dev/8Y2lHMgJZVM.

laurensdijkstra commented 6 years ago

Considering glTF 2.0 with physically based rendering shaders it would be very logical to implement the lighting in a more physically based way as well IMO.

emackey commented 6 years ago

There's some chance I'll be looking into this in the next couple of weeks.