Am 15.11.2012 17:43, schrieb Bruno Cabasson:

>> POV-Ray does not seem suited to single precision.  Perhaps it is the nature of
>> mathematically defined shapes that they require higher precision than mesh-based
>> systems.
>
> Meshes also involve maths ...

Mesh math is pretty trivial, requiring only linear equations to be 
solved. But even a seemingly simple thing as a sphere already involves 
quadratic equations, and cubic equations aren't uncommon in POV-Ray 
either. Some primitives require even higher-order polynomials.

And the higher the order of a polynomial, the higher the dynamic range 
needed to solve it.

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