[Radiance-general] RE : how to use pfilt to perform anti-aliasing

[Lars O. Grobe]

Hi!

> The content of the test.rif file is:
(...)
> RESOLUTION= 800 800 800

Why do you have three times 800 here? Looks like the third one gets 
interpreted as pixel aspect (-pa), which leads to the weird result that 
pfilt tries to downsample from a resolution of 2400x2400px to 800x1px.

Try

RESOLUTION= 800 800

Cheers, Lars.