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From: czhj@vax1.ccs.cornell.edu (Ted <^_^>)
Newsgroups: comp.sys.amiga
Subject: Re: Amiga Hires(640x400 Interlaced)
Message-ID: <215@vax1.ccs.cornell.edu>
Date: Mon, 15-Dec-86 03:23:24 EST
Article-I.D.: vax1.215
Posted: Mon Dec 15 03:23:24 1986
Date-Received: Tue, 16-Dec-86 20:45:05 EST
References: <383@jplpro.UUCP> <620001@ui3.UUCP>
Reply-To: czhj@vax1.UUCP (Ted <^_^>)
Organization: Cornell Computer Services, Ithaca NY
Lines: 28


Ahh...more flicker comments.  People, as has been said before, this isn't
the Amiga's fault (no, this isn't an attack on previous poster's comments)
it is simply the way things work with an NTSC interlaced screen.  You can
easilly see 30hz flicker if the contrast is set up high, the way people like
to set it.  Try setting up the screen preferences so that the screen looks
like a Mac -- that is, inverse video.  Medium gray background, dark foreground
colors.  Then, when you draw thin lines and other stuff that would normally
flicker, there ain't nothing to flicker, as it's always dark!  If you insist
on drawing many horizontal lines separated by only one line, then the 
background will flicker (single pixel bright lines always will), however
keeping the contrast low will reduce the problem to a minimum.  You might
also try turning off that annoying overhead fluorescent light, as the two
flickering togethering can drive you insane (literaly, some studies showed
that flickering lights is enough to cause mental disorders -- no, I have no
references, sorry).  Anyway, unless somebody comes out with a scan doubler,
which is a box that keeps the flicker away by filling in the lines, you just
have to play with your preferences and/or change lighting.

And another thing, try proper adjustments on your monitor.  It's frightening
how few people really know how to adjust their screens.  it takes a steady
hand on the V-hold, but if you set it just right, you can get rid of almost
any indication of raster lines, which won't do much for flicker, but will
allow you to take superb photos from the monitor (use long exposures and a tripod as well for best results.  Also, watch out for reflections...).

Well, that's about it for now.  Have phun and keep the contrast LOW.

---Ted Inoue