"Warp" <war### [at] tagpovrayorg> wrote in message 
news:427b8781@news.povray.org...
>  There's a speed-related oddity with one scene:
>
>  scenes\advanced\ionic5\ionic5.pov at 640x480 +a +am2 takes 18 seconds
> to render with pov3.6 and almost 4 minutes with pov3.7beta4.

Look at the stats for quadric tests and succeeded percentage. It's way off. 
I'm seeing somewhere around 40% succeeded from a much lower number of ray 
tests in 3.6, yet in 3.7 beta 4 it has over 92 million tests with a mere 5% 
or so succeeded.

On my computer the render time is even wider than yours was, being 14 
seconds for 3.6 and 6 minutes 10 seconds for the beta.

Bob Hughes

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