Elliptical filtering

[Bernard Lebel <3dbernard(at)gmail.com>]

Hi,

I am baffled at something. I have a scene with rather large textures 
(3500x3500 and higher). In Pic format, it renders in 45 seconds.

So I'm looking to save render time, and memory while we're at it, so I 
convert textures to pyramidal map float files (imf_copy -p [...] map 
rgba_fp).
Then I turn on elliptical filtering, set the Maximum Pixels for Minimum 
Radius to a low value 1.3, because higher than that is generally not 
necessary.

In the past, I got much faster render times. However right now the 
render time explodes: it's at least 5 times longer than with the Pic 
version.

Any idea?


Thanks
Bernard
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