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Explanation of canvas, engine, scene, cameras


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I've determined I could have multiple canvases each with its own scene and engine, but then I wondered if I could have multiple scenes in one canvas. But I couldn't get it to work and I was just shooting in the dark. What I was wondering if it was possible to "fade" between scenes like you can do with video. 

So is there an explanation of canvas, engine, scene, cameras as far as what can have multiple instances? I do see there is a notion of camera "Rigs" which appears to allow multiple cameras for things like stereoscopic effects, is there other uses for a "Rig"?

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engine is the controller (the driver) for webgl and it is tied to a canvas.

But then you can have multiple scene per canvas and multiple cameras per scene.


Here is an example with two scenes (one fading into another): http://www.babylonjs-playground.com/#1AP18W#2

Two scenes blended in: http://www.babylonjs-playground.com/#UCFKM#9

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@Deltakosh Thanks, my ugly test is working now, after looking at the examples I have a much better idea how canvas, engine, scenes and lights are working, although much much more to learn.

For future reference if anyone reads this thread, I initially missed setting autoClear = false. Not doing so obviously caused only the last scene to be rendered.

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