different appearance on different PC's

[Palmer, Mark (CMIS, Floreat Park)]

Hi,

Simple question, i have written an application in vtk using Tcl/Tk that i
use on PC's running NT4. The problem is that the rendered image looks quite
different on two different PC's using exactly the same code. In this case by
different i guess i'm meaning the quality of the image. The image is a
surface, coloured using a rainbow type of LUT.  On one machine the image
looks 'flat', with say the gradations between the greens not being very
apparent and the shadowing from the lighting not being at all obvious (if at
all). On the other machine, the surface looks like it is being illuminated,
and has much more of a 3d 'presence', even when static but certainly when
rotated.

The machine with the 'better' image is a laptop using a Neomagic magic media
256AV graphics with 2 megs, the machine producing the inferior image is a
desktop model with an nvidia riva nt2 chip with 32Megs. Intuitively i
expected the latter to be producing a better image. Now can anyone enlighten
me as to what is going on here. Is there some sort of software switch i
should select or what?

Thanks

Mark Palmer
Leeuwin Centre
Environmetrics Project
65 Brockway Rd,
CSIRO Mathematical and Information Sciences
Floreat Park
Phone:              61-8-9333-6293
Western Australia
Fax:                  61-8-9333-6713
Australia, 6014 
email                 Mark.Palmer at cmis.csiro.au
URL:                 http://www.cmis.csiro.au/envir


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