Quote:"Hans Spieker" writes:
>Hi all raytracing enthousiasts out there,
>Is there anyone out here who knows how the following setting work in
>povray3?
> aperture 1
This determines the range of blurring. The smaller the value, the smaller the
range. In other words, the "zone of sharpness" increases as aperture
decreases. One is a good starting point.
Quote:> focal_point <0,1,0>
This is where the camera is completely in focus. I typically set this the
same as the look_at vector, but different artistic effects can be created by
using different vectors.
Quote:> blur_samples 40 "What is a good value for this setting, and what does
>it mean?
This is the maximum number of samples that POVRay will use to get the value of
a pixel. Kind of like the anti-aliasing depth value, but it is a direct
value. It is controled with an adaptive system, governed by the following two
parameters.
For quicker traces, values less than 10 work well. For higher quality, 40 is
pretty good. The more samples, the better the quality.
Quote:> confidence 0.98 "What is the meaning of this switch
When shooting sample rays, POVRay determines the probability that the current
result is what the final pixel color should be. When this value hits the
confidence level, it stops shooting rays and moves on. It should range from 0
to 1, although you'll typically want a value better than .9
Quote:> variance 1/255 "Same for this one
Variance determines how close is close. If the pixel color is off by less
than the variance value, it's considered a match. Therefore, for a final
trace, you want this value to be 1/max_colors. For faster traces, use 1/(some
number less than max_colors).
Probably the reason your trace looked unrealistic is because of the
focal_point setting. Everything else seems pretty good. Of course, aperture
is a value that can be played with. The other values mainly control quality
and speed.
BTW, focal blurring replaces normal anti-aliasing.
Michael D Johnson
Member of the "POVRay for OS/2 Porting Group"
http://quark.gmi.edu/~redbeard
POVRay Utilities Page:
http://quark.gmi.edu/~redbeard/raytrace/POVRay-Util.html
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