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the scene is a started turtle bowl (you know, the transparent plastic
thing with a tree in the middle :)
and at some camera<->bowl_surface angle the ray are pitch black. (sound
like a prevented div-by-zero kind of bug)
I have an AMD K6-200MMX, 64Meg ram, win95, and this bug append every
time, on both 3.01 and 3.1
here's the scene:
--------------- cut here ------------------------
// "transparent" object that create a ?bug? every time
// I've tried it with povray 3.01 and 3.1
// see the last lines of the file
// ==== Standard POV-Ray Includes ====
#include "colors.inc" // Standard Color definitions
#include "textures.inc" // Standard Texture definitions
// ==== Additional Includes ====
#include "CHARS.INC" // FIXME-add comments describing each of these
#include "CONSTS.INC"
#include "METALS.INC"
#include "SHAPES.INC"
#include "SHAPES2.INC"
#include "SHAPESQ.INC"
#include "SKIES.INC"
#include "STONES.INC"
#include "STONES2.INC"
#include "WOODMAPS.INC"
#include "WOODS.INC"
camera
{
location <-0.3 , 0.0 ,-5.0>
look_at <0.001 , 0.0 , 0.0> // tried to move the camera a bit to see
if wasn't a "div by zero" bug
// didnt change much
rotate <20, 0, 0>
}
// create a regular point light source
light_source
{
0*x // light's position (translated below)
color red 0.75 green 0.75 blue 0.75 // light's color
translate <0, 0, -5>
}
// create a regular point light source
light_source
{
0*x // light's position (translated below)
color red 1.0 green 1.0 blue 1.0 // light's color
translate <-1, 2, -2>
}
// create a regular point light source
light_source
{
0*x // light's position (translated below)
color red 0.75 green 0.75 blue 0.75 // light's color
translate <2, 10, 5>
}
plane
{
y,
-0.1
texture {
checker
texture {
T_Wood10
rotate<32, 59, 12>
scale <2,2,2>
}
texture {
T_Wood11
rotate<60, 10, 34>
scale <2,2,2>
}
}
}
object {
union {
difference {
cylinder // outer cyl
{
0*y, 0.5*y, 2
}
cylinder // inner substact (up)
{
0.2*y, 0.6*y, 1.9
}
cylinder // inner substract (bottom)
{
0.1*y, 0.6*y, 1.8
}
torus { // inner substract (bottom plastic curve)
1.8, 0.1
translate <0, 0.2, 0>
}
}
torus { // bottom plastic curve
1.9, 0.1
translate <0, 0, 0>
}
torus { // top plastic curve
1.95, 0.05
translate <0, 0.5, 0>
}
}
texture {
pigment {
// use one or the other ... ?bug? with both
color rgbft <0.9, 0.9, 1, 0.9, 0>
//color rgbft <0.9, 0.9, 1, 0, 1>
}
}
finish{
phong 0.7
}
}
--------------------- cut here ----------------------------------
Stephane Hockenhull
Rv[PotamSoft]
mailto:pot### [at] videotron ca
http://pages.infinit.net/potam/
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Johannes Hubert wrote:
>
> Ouch! Not a bug!
>
> Look in the docs for "max_trace_level"...
>
> Johannes.
k, next time i'll post in general first to make sure it's a bug.
little suggestion: you might put a (one time, not for every rays :)
warning in povray, so that when max_trace_level is reached, it says:
"oups, max_trace_level reached, try raising it!"
It should be simple to implement, and prevent raytracing-newbies like me
to complain about bug that are in fact protections from infinite and
almost-infinite loops :P
--
Stephane Hockenhull
Rv[PotamSoft]
mailto:pot### [at] videotronca
http://pages.infinit.net/potam/
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