Hi Chris,
Thanks for your reply.
I can't attach the file so I posted it to my site again. Below is some more
guess work. Anyway, the file and new test results which are meaningless to
me .... link is as before ....
http://www.neico.co.nz/3d/RS3DImageFilesToPrint.html
In this state it shows that the artifact is half of the cylinder's height
.... i.e. the position of the artifact has changed as well as becoming about
50% rather than the 100% black on the main project (the cameras on the main
project are 100% black).
I don't think I can shift 2,000 analytical cylinders to sds cylinders
without hitting the wall. As nurbs or sds the effect doesnt show.
All materials for illumination, etc that I tried and Direct, Spot and Point
lights all show the thing if the camera/viewport is set to perspective and
shadows are called for. I have not tested it yet but I think the flashlight
from the camera does not seem to show different strengths and does seem to
echo the raytraced intensity of the artifact. But then again I suppose the
flashlight is set to not create raytraced shadows.
A variant of this was showing in the early files as black patches all over
everything not confined to positions as the current events are. I put it
down to having included the dirt material with each and every object and
then in sub-groups etc but maybe my conclusion about that was incorrect. I
moved on to other things and am not certain I tested my idea. However some
subsequent uses of the object sets have not shown the artifact.
The effect is a raytrace effect involving shadow and perspective however it
is a very curious shadow in many situations.
Happily the image is interesting at Ortho since I had intended using very
long focal length, close to telephoto, anyway. That render is going down now
(12 hours to go). I'm rendering it in Ortho but my only use would be to
check some fine detail, I really need perspective.
Anyway, here is the file.
Thanks again
Neil Cooke
----- Original Message -----
From: "Mungenast & Standley" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Wednesday, January 04, 2006 6:16 PM
Subject: Re: Shadow Error
Hi Neil,
I have had similar puzzling thingies with large file.
Are you using massing nested instances?
You say it is only with older objects? Analyticals? Convert to something
else?
What type of light fixture with what type of shadow? Try changing to
direct. Or spot with raytrace and 0 shadow quality and size. Or increase
the quality.
Try reducing your project to the smallest size where you can still
produce the error. Post it.
chris m
Neil Cooke wrote:
Third try .... no attachments since these fail. The JPG mentioned is
at http://www.neico.co.nz/3d/RS3DImageFilesToPrint.html and so is the
"Guidelines to Getting Image Files to Printers" ... it's not a
tutorial. Anyway, hoping there's an answer to the Shadow error I've
run into, Neil Cooke
----- Original Message -----
From: Neil Cooke
To: [email protected]
Sent: Wednesday, January 04, 2006 1:43 PM
Subject: Shadow Error
Second post since the the first didnt make it ... so
resampled the jpg. Hi List, Attached JPG shows a render from
a perspective camera and on the right an ortho camera.
Analytic cylinders show an incorrect dark artifact that is
not possible from the lighting. I would like to render this
scene in perspective but cant beat this thing. Tried
different illumination materials, etc., but all fail . . .
although some give strange results within the areas
concerned. Only some cylinders imported or copied from an
old file show this thing. No artifacts show if I select
"doesnt cast shadow" for the objects or "no shadows" from
the light ... but while the artifact is gone so too is any
scene dynamic. Hoping there's a fairly simple fix since
there are about 3,000 of these cylinders in the scene.
Meanwhile I'll continue pressing buttons. Neil Cooke
