I just compiled the official beta.35a sources for Linux, to find that 
there's something whacky about it; here's how it renders the sample 
scenes "abyss.pov" and "fractals2.pov".

I'm running openSUSE 11.2 (x86_64) on an AMD Phenom 9650 2.3GHz system 
with 6GB RAM; POV-Ray 3.7.0.beta.35a was compiled with g++ 4.4.

The symptoms can be seen with TGA and JPG output as well, but not with 
HDR or PPM, so obviously the error is somewhere in the image file 
generation.

It appears that in the offending cases, color components with a zero 
value are "upped" to a value of 255 instead (or maybe "downed" to -1, 
hard to tell).

Strange thing is:

- Only a few images seem to be affected, and even in the affected images 
not all parts suffer the effect (for instance, when turning all lights 
off in abyss.pov, the parts that are pink now will show up white, while 
everything else will be pitch black except for a few white specks).

- The symptom did not occur with previous betas I had compiled with 
Intel's icpc compiler; however, I had to recompile those recently, and 
couldn't get the icpc to do the job anymore for unknown reasons, so 
recompiled them with g++ 4.4 as well, and now I see the same symptom 
with those as well.

- The symptom does not occur on Windows.

Can anyone confirm? This error looks really freakish to me at present.

Post a reply to this message

Attachments:
Download 'abyss.pov.png' (366 KB) Download 'fractals2.pov.png' (882 KB)

Preview of image 'abyss.pov.png'

Preview of image 'fractals2.pov.png'