Am 25.09.2018 um 19:55 schrieb Warren:
> location <0, 4, 0>
> look_at 0
> sky z
> up 4*z
> right 4*x
> Ps: from my point of view, the above camera settings (without the 'direction'
> line) should make a camera without any mistaking for povray , I mean povray
> shouldn't need to append default settings because it has everything it needs to
> make the render ?
> Thank you.
Without the `direction`, POV-Ray has no idea whether you want a
left-handed or right-handed coordinate system.
Remember, the `look_at` mechanism works as follows:
(1) POV-Ray first sets up the camera as specified by your `up`, `right`
and `direction` vectors, as if the `look_at` statement wasn't there.
This defines the handedness of the coordinate system, the aspect ratio,
and (depending on camera projection) the zoom (unless you also specify
(2) Once that is done, POV-Ray re-orients the camera (rotating it around
its location) in such a manner that the `look_at` point is in the center
of the image (for most projections at any rate).
So specifying `look_at` is no replacement for specifying `direction`.
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