POV-Ray : Newsgroups : povray.beta-test : 3.7.0.beta16.msvc8.win32. Slower than 3.6.1c, brighter media and wrong output filetype. Server Time
25 Apr 2024 05:30:58 EDT (-0400)
  3.7.0.beta16.msvc8.win32. Slower than 3.6.1c, brighter media and wrong output filetype. (Message 1 to 5 of 5)  
From: Rarius
Subject: 3.7.0.beta16.msvc8.win32. Slower than 3.6.1c, brighter media and wrong output filetype.
Date: 14 Nov 2006 13:14:08
Message: <455a0770@news.povray.org>
Just downloaded the latest 3.7 beta in preparation to my move to a new dual 
core CPU later this week.  I thought I'd do some comparison tests with my 
old CPU before I changed over...

I have posted the source, and both result imaged to povray.binaries.images 
with the same subject line...

The source file (ssc4.pov) was posted a month or so back on 
povray.binaries.images.. I am sorry I can't remember who posted it...

Both renders were done using the following options...
    +FS +Q9 +W640 +H480

My PC is an AMD Athlon2400+ with 1.5Gb memory.

First problem!
    Version 3.7.0.beta16 was MUCH slower.  Version 3.6.1c took 4m46s, while 
Version3.7.0.beta16 took 7m43s... that's 60% more!  Is there a better build 
or should I be using some different options?

Second problem!
    Version 3.7.0.beta16 rendered the image noticeably lighter. See post in 
povray.binaries.images.  I have converted both images to JPGs too keep the 
filesize down.

Third problem!
    Although the option +FS was specified, Version 3.7.0.beta16 output a 
file with a TGA extension.  The file is actually a BMP as I specified, but 
with the wrong extension.

Rarius

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From: Chris Cason
Subject: Re: 3.7.0.beta16.msvc8.win32. Slower than 3.6.1c, brighter media and wrong output filetype.
Date: 14 Nov 2006 14:26:13
Message: <455a1855$1@news.povray.org>
Rarius wrote:
> Second problem!
>     Version 3.7.0.beta16 rendered the image noticeably lighter. See post in 
> povray.binaries.images.  I have converted both images to JPGs too keep the 
> filesize down.

Did you check the message window for any warnings? Are you familiar with the
gamma issues (as per the release notes)?

> Third problem!
>     Although the option +FS was specified, Version 3.7.0.beta16 output a 
> file with a TGA extension.  The file is actually a BMP as I specified, but 
> with the wrong extension.

So it does. Thanks for letting us know.

-- Chris


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From: Rarius
Subject: Re: 3.7.0.beta16.msvc8.win32. Slower than 3.6.1c, brighter media and wrong output filetype.
Date: 14 Nov 2006 15:04:25
Message: <455a2149@news.povray.org>
> Second problem!
>    Version 3.7.0.beta16 rendered the image noticeably lighter. See post in 
> povray.binaries.images.  I have converted both images to JPGs too keep the 
> filesize down.

After an hour or so reading through this newsgroup I noticed that the 
default value for assumed_gamma has changed... this probably explains this 
problem...

Sorry for wasting everyone's electrons.

Rarius



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From: Chris Cason
Subject: Re: 3.7.0.beta16.msvc8.win32. Slower than 3.6.1c, brighter media and wrong output filetype.
Date: 15 Nov 2006 08:28:24
Message: <455b15f8$1@news.povray.org>
Rarius wrote:
> After an hour or so reading through this newsgroup I noticed that the 
> default value for assumed_gamma has changed... this probably explains this 
> problem...

It is also mentioned in the POv-Ray warning messages and in the release
notes. I suspect you did not look at either; if you had you would have saved
yourself an hour of newsgroup reading.

It's particularly important to read the release notes since it is there that
changes such as this are documented.


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From: Rarius
Subject: Re: 3.7.0.beta16.msvc8.win32. Slower than 3.6.1c, brighter media and wrong output filetype.
Date: 15 Nov 2006 19:12:37
Message: <455bacf5$1@news.povray.org>
OK..OK.. I ought to know better! I am after all a professional software 
developer!

Many thanks for your help... I know I'm not the first and wont be the last, 
but I just want to express my thanks to you and everyone else who bring 
POV-Ray to us... I've been using it since V2.0 and can't think of another 
bit of software that is as powerful and useful and best of all free...

Note to self: Read release notes!

Rarius

"Chris Cason" <del### [at] deletethistoopovrayorg> wrote in 
message news:455b15f8$1@news.povray.org...
> Rarius wrote:
>> After an hour or so reading through this newsgroup I noticed that the
>> default value for assumed_gamma has changed... this probably explains 
>> this
>> problem...
>
> It is also mentioned in the POv-Ray warning messages and in the release
> notes. I suspect you did not look at either; if you had you would have 
> saved
> yourself an hour of newsgroup reading.
>
> It's particularly important to read the release notes since it is there 
> that
> changes such as this are documented.

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