[Gate-users] why an mesh object is not a solid volume

[Howard]

Dear Gate-users,

Is there anyone out there an expert on the tessellated volume? I generated
a tessellated mesh object based on a 3x3 binary matrix:

0 1 0
1 1 1
0 1 0

where 0 means completely opaque and 1 completely transparent. For some
reason when I applied this volume in GATE as a phantom (set materials as
Tungsten) for X-ray, there was no beam attenuation. In other words, this
volume behaved like an empty shell instead of a solid piece. The STL file
for this volume in ASCII format is attached to this email for your
reference.

It would be truly appreciated if any expert on tessellated volume can help
out or suggest any software allowing us to look for more detail of the
volume?

Howard
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.opengatecollaboration.org/pipermail/gate-users/attachments/20200706/5c8c65a8/attachment-0001.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: ASCIITest3x3.stl
Type: application/sla
Size: 8897 bytes
Desc: not available
URL: <http://lists.opengatecollaboration.org/pipermail/gate-users/attachments/20200706/5c8c65a8/attachment-0001.stl>