-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

St. wrote:
> Hey all,
> 
>    I'm working on a scene where I have a problem with some horizontal lines, 
> and yes, the problem is antialiasing. The thing is, I've tried +a0.0 +am2 
> and there's really not a lot of difference in this particular part of the 
> scene, still jaggies even though the scene as a whole does look better.
> 
>    Anyway, these horizontal lines are really probably about 15 - 20 degrees 
> to the horizontal in the actual image - hence the jaggies.
> 
>     Now to the point. ;) I did a few experiments* where I used +a0.0 +am1 
> and the same but with +am3, and there was a significant difference in speed:
> 
>     o-     +a0.0 +am1  = 35 secs 
>     o-         "     +am2  = 2:30 secs
>     o-         "     +am3  = 36 secs
>     o-    +a0.0    ---    = 39 secs
> 
	In addition to what Warp already said:
 - +am1 is the default, therefore "+a0.0 +am1" and "+a0.0" are
identical;

 - with the default recursion depth of 3, method 1 will use 9
samples per pixels, whereas method 2 will use 81 samples per pixel.
This explains the timing differences you see.


	To improve the jaggies, I would suggest rendering at a higher
resolution (say multiplying the image dimensions by 2), then
downscaling the image. At the same time, you should raise the AA
threshold to 0.1 or 0.2 in order to improve the rendering speed.

		Jerome
- --
+------------------------- Jerome M. BERGER ---------------------+
|    mailto:jeb### [at] freefr      | ICQ:    238062172            |
|    http://jeberger.free.fr/     | Jabber: jeb### [at] jabberfr   |
+---------------------------------+------------------------------+
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.7 (GNU/Linux)

iD8DBQFGya0hd0kWM4JG3k8RAiX6AJ9J9uOOorbyzvI31mz2X681Svw57QCghvUE
Q0fw9dUSbT8/fF/0jV2NMQI=
=3KTv
-----END PGP SIGNATURE-----

Post a reply to this message