Hi all!
I tried and re-rendered one of my very first scenes with
3.7.0.beta5a.icl8.win32 and 3.6.1a.icl8.win32.
Results and source file posted in p.b.i.
It displays a semi-transparent dice. When using a transmit value around 0.4,
the dice appears to be more transparent with 3.6.1a than with beta 5a.
Rendered without AA, so this is not an issue. No media in the dice. Doesn't
look like a gamma issue, either. Bumping up max_trace_level didn't change
anything (i didn't really expect it to, though...)


JYR

PS : Athlon XP 2800+, Windows XP home edition.

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"JYR" <jyr### [at] hotmailcom> wrote:
> [a number of things]

hmmm, i should've done my homework before posting. Here is a shorter script
that displays what might be the source of the trouble.

//begin source
global_settings {
    assumed_gamma 2.2
    max_trace_level 8
}

camera {location -7.2*z look_at 0}
light_source {<3, 4, -5> rgb 1}

difference {
    box {-1, 1}
    sphere {-z, .15 pigment {rgb .1}}
    pigment {rgb 1 transmit .4}
    rotate -35*y rotate 45*x
}

//end source

It gives artifacts in the "back" sides of the box. Even worse, these
artifacts aren't even constant from run to run, i mean, by hitting the
"Run" button repetitively, the artifacts change.
BTW, i tried to attach the semi transparent pigment to the box instead of to
the difference, to no avail.
Hoping this helps,

JYR

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"JYR" <jyr### [at] hotmailcom> wrote:
> It gives artifacts in the "back" sides of the box. Even worse, these
> artifacts aren't even constant from run to run, i mean, by hitting the
> "Run" button repetitively, the artifacts change.
> BTW, i tried to attach the semi transparent pigment to the box instead of to
> the difference, to no avail.

I've been getting those kinds of artefacts on other things too.  I'm
guessing it has something to do with the way 3.7 renders in blocks...  Sure
is strange, though...

Bent

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"Bent" <nomail@nomail> wrote:

> I've been getting those kinds of artefacts on other things too.  I'm
> guessing it has something to do with the way 3.7 renders in blocks...  Sure
> is strange, though...
>
> Bent

Good point indead! I hadn't noticed that these square artifacts were the
very size of the render blocks.

JYR

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