Trees in BIMx inconsistent

[kevin b]

I have a BIMx model of an interiors project, have placed several trees outside just to add some life beyond the windows. But the trees show up intermittently when I export to BIMx, most times they do not show up, but they did show up a couple of times so now I'm trying to resolve why, or what causes them to show or not. Any help/suggestions would be appreciated. I have tried bitmap trees and modeled trees, all from the standard ArchiCAD library, the bit map ones showed up, the modeled trees showed up without leaves.

[kevin b]

And I should add, some of them show up sometimes but not all, even if they are all the same, say all bitmap. And if I "fly" outside they are all visible. I have tried adjusting the transparency settings in BIMx to the most transparent level but still nothing?

And the windows in question are a variety of curtain walls and standard windows, all with the same glass material assigned, and the type of window does not seem to have an effect (ie when I can see some trees but not all, it is independent of which type of window I am looking through.

[Erwin Edel]

Bimx can only show one layer of transparancy and I think there is an issue with showing textures through transparant materials. I'm guessing this is what is causing the problems you described.

[kevin b]

The odd thing is I can see some things through the windows but not the trees. And I can see the trees through some of the windows but not all of them (and they were all copied from one original. And it seems to change when I generate a new BIMx.

[NCornia]

Kevin,

BIMX does support multiple layers of transparency, however, there does appear to be a limitation of displaying textures with an alpha channel through
transparent materials. Maybe this is what Erwin meant. See if the leaves on your trees have a material with an alpha channel texture. If so try changing the
material of the leaves to a material with a solid texture.

HTH