At the moment there are several keywords with values, that must appear in every scene description file. Every scene description file must begin with the BEGIN_SCENE keyword, and end with the END_SCENE keyword. All definitions and declarations of any kind must be inside the BEGIN_SCENE, END_SCENE pair. The RESOLUTION keyword is followed by an x resolution and a y resolution in terms of pixels on each axis. There are currently no limits placed on the resolution of an output image other than the computer's available memory and reasonable execution time. An example of a simple scene description skeleton is show below:
BEGIN_SCENE RESOLUTION 1024 1024 ... ... Camera definition.. ... ... Other objects, etc.. ... END_SCENE
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