Warp <war### [at] tagpovrayorg> wrote:
>   12 yes, but are you sure 0.3 can be converted from double to float without
> losing precision? (Not that it really matters with literals, though...)

  Answering my own question, the bit pattern for 0.3 is:

0 01111111101 0011001100110011001100110011001100110011001100110011

(see http://en.wikipedia.org/wiki/Double_precision_floating-point_format
for the meaning.)

  This makes be believe that 0.3 is actually not accurately representable
with base-2 floating point numbers, and hence converting from double to
float does lose precision, technically speaking.

-- 
                                                          - Warp

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