To conserve memory, mental
ray deals with 32-bit floats for all floating point data (transforms,
positions, uvs, etc), wether on a 32-bit or 64-bit system. This gives you
roughly seven digits of precision and no more.
I've been pushing for transforms, at
least, to be treated as doubles, which would give about 15 digits of
precision. That may actually show up in the future (fingers crossed) but
currently you're limited to what's there.
- ½
aah, yes, in softimage they are,
but when exported to mental ray, they are loosing
precision some times.
I want to make it consistent so less
rig evaluation problems, aka rigs in renders being
displaced
when sending to the farm.
instead of 0.80000000 ->
0.8e1 etc.
O.
----- Original Message -----
Sent: Tuesday, July 17, 2007 3:58
PM
Subject: RE: adding precision to
renders
Are
you sure the problems are down to accuracy? I think you?ll find that
although the numbers in the ppgs look lo res, the actual numbers are full
floating point.
Try
this:-
SetValue("cube.cube.length",
8.00000000000001, null);
logmessage(
getValue("cube.cube.length" ) );
From: owner-xsi(at)Softimage.COM
[mailto:owner-xsi(at)Softimage.COM] On Behalf Of Oliver
Heijmans
Sent: 17 July 2007 20:13
To:
XSI(at)Softimage.COM
Subject: adding precision to
renders
How do you get
XSI mental ray to add more precision like 8 digit numbers
so renders are
more accurate, and you eliminate problems. (so rigs are evaluated more
precisly )
Before plotting
or creating Mi's .
Is there a way to
add that to your scene. In certain packages you can add precision by
adding an attribute.
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