Hi,
Sorry for failing to describe my question clearly. I follow the
recommendation to make a more detailed description:
I hope that would be clearer. Thanks.
Hi ChenGuang,
This is a nice illustration of the problem. If you rendered these with rvu, I wouldn't expect the pixels to match exactly, since the actual point rendered is randomly chosen from within each region, and using the default parameters of rvu, radiances are only accurate to within 15% (see the -pt setting from "rvu -defaults"). This is to increase rendering speed. To avoid sampling discrepancies, you should use rpict instead with the following settings:
rpict -ps 1 -pj 0 -dt 0 -sj 0
Even so, your pixels will only match within 1%, due to round-off errors in the pixel encoding itself. To get better accuracy, you will have to use rtrace.
-Greg
···
From: "Sun ChenGuang" <[email protected]>
Date: May 30, 2007 7:49:10 PM PDTHi,
Sorry for failing to describe my question clearly. I follow the
recommendation to make a more detailed description:
http://www.drivehq.com/file/df.aspx/publish/scg03/doc/description.pdf
I hope that would be clearer. Thanks.