Paul:
Thanks for the hint. I do use the newer “from” syntax.
   export snapshot from rect  snapRect to image "mapSnap"

Thanks,
Bill

> On Jul 31, 2015, at 3:35 PM, Paul Hibbert <p...@livecode.org> wrote:
> 
> Bill,
> 
> I’ve just read the following explanation from RG relating to another snapshot 
> problem and wondered if it also relates to your student’s problems…
> 
>> 
>> The "from" option renders the object into a new buffer set up just for the 
>> snapshot, while the older "of" syntax grabs the object's rect from the 
>> composite screen buffer.
>> 
>> LiveCode renders only the content region of a window but the window itself 
>> is rendered by the OS, so it has no choice but to obtain that image from the 
>> screen buffer.
>> 
>> -- 
>> Richard Gaskin
>> Fourth World Systems
>> Software Design and Development for the Desktop, Mobile, and the Web
>> ____________________________________________________________________
>> ambassa...@fourthworld.com                http://www.FourthWorld.com
> 
> When I first read your post I wondered if the problem could be due to low 
> grade or incompatible video cards in the affected machines, if that’s the 
> case then the above explanation would make sense, to me at least.
> 
> So, the question is, does your "export snapshot" script use the “from” or 
> “of” option?
> 
> If it’s the “of” option then switching to the “from” option may fix the 
> problem your students are seeing.
> 
> Just a thought.
> 
> Paul
> 
> 
>> On Jul 16, 2015, at 14:07, William Prothero <proth...@earthednet.org> wrote:
>> 
>> Folks:
>> I have an application that is being used by a class of Earth Science 
>> students and get failure reports from two who use Windows 8. One lives in 
>> Australia and one lives in Japan. The app works fine on Macintosh. I’ve also 
>> tested it on my own installation of both Windows 8.1 and 7, 32 bit and 64 
>> bit versions. I can’t get the reported pixellation of the map and screen. 
>> 
>> I’m wondering if it is something related to foreign installations. The 
>> symptom is extreme pixellation of images captured with the "export snapshot” 
>> command. I live in the US.
>> 
>> So, I wonder if somebody with Windows 8 would be willing to download the app 
>> and try it, and perhaps give me an idea of what might be going on. If it’s a 
>> bug in “snapshot”, it would be important to be reported and fixed. 
>> Otherwise, I’m pretty stuck on figuring out what is going on. 
>> 
>> Here are links:
>> Windows zip file of the app:  
>> <https://www.dropbox.com/s/lsn087vrhstxvg4/PT_Explorer-Windows.zip?dl=0>
>> Pixellated Image sent by a student 
>> <https://www.dropbox.com/s/m2frv9i0dg7mxtp/Explorer%20in%20Windows%208.1.pdf?dl=0>
>> 
>> Thanks for any help or feedback you can give me. 
>> 
>> Regards,
>> Bill
>> 
>> 
>> William A. Prothero
>> http://es.earthednet.org/
>> 
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> 
> Regards,
> 
> Paul Hibbert
> p...@livecode.org
> 
> 
> 
> 
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