Different display of materials projection in Smooth display and Render

Re: Different display of materials projection in Smooth display and Render

John Allen — Tue, 03 Sep 2013 20:11:48 GMT

this has been a 'bug' forever, at least in respect to Bentley Architecture elements (walls, forms, Triforma elements etc..) . I always build 2 materials with 90deg orientations because this ALWAYS comes up. Building a material that has all rotations at "0" doesn't always work if you have multiple pattern files or the bump image happens to be 90deg rotation to the pattern map.

Re: Different display of materials projection in Smooth display and Render

Jan Dvorak — Fri, 30 Aug 2013 20:41:22 GMT

So, here's an update of what Paul from Bentley came up with.

Apparently, it's a bug, but it only manifests itself when using a material that has a rotation specified (e.g. NOT 0 degree).

A simple rule follows from this:

when using Material Projection, use a material that has 0 degree rotation.

Thanks, Paul, for clarifying this issue!

Jan

Re: Different display of materials projection in Smooth display and Render

Jan Dvorak — Fri, 30 Aug 2013 16:42:48 GMT

Hi Paul,

thanks for the quick reply. I will send you the DGN plus the DGNLIB (has the materials definition) plus the JPG for the material in question later this afternoon (Europe time).

As for attaching it without a projection: once you have the DGN, you will see that when attaching a material "with oriented surface" (e.g. wood) to some elements, that orientation aligns with the global XY axis. The project I am working on and where I discovered this behaviour is not aligned to the global XY axis (I am using 3 ACS systems), therefore I use Material Projection and Rotation (yes, I could put a rotation angle for the material in question, but since I have 3 ACS systems, I would need 3 different rotation angles and therefore 3 variations of that material...).

Anyway, that´s degressing from the initial issue. I will send you the files within a few hours.

Regards,

Jan

Re: Different display of materials projection in Smooth display and Render

Paul Chater — Fri, 30 Aug 2013 15:53:51 GMT

Hi,

That looks like a bug to me. Can you send me your file so I can investigate it.

You should be able to do that mapping without using a projection. It looks to me like parametric should work for you with an appropriate rotation angle.

Regards

Paul Chater