That sounds like a distinct possibility. Thanks a lot.

Third time lucky. Thanks for pointing out there was a problem.

<r><URL url="https://1drv.ms/u/s!AuCx5sy3SAgmyzguUHTJ2VErnlvf"><s>[url=https://1drv.ms/u/s!AuCx5sy3SAgmyzguUHTJ2VErnlvf]</s>https://1drv.ms/u/s!AuCx5sy3SAgmyzguUHTJ2VErnlvf<e>[/url]</e></URL> <br/>
<br/>
[url=http://]<URL url="https://1drv.ms/u/s!AuCx5sy3SAgmyzcsHVOVBfWWcyJk">https://1drv.ms/u/s ...

Adding d 0.5 to the MTL material description worked for the normal display, but the Photo Generation in the top two levels still produces opaque glass. Is there another condition needed for the photos?

Excellent, thanks so much Emmanuel.

<t>Thanks so much for your help.<br/>
<br/>
I've not succeeded yet, but I've found an object I created sometime ago with glass which actually worked. I really just need to bite the bullet and learn Blender. My current workflow destroys the names applied to object elements. GMAX doesn't export to obj ...

<t>I've used Sweethome3d for many years, and used to model furniture using Art of Illusion. I seem to vaguely remember that one could name an object in AoI with something like sweethome3d_window_pane, and it would automatically be transparent when the OBJ file was imported. <br/>
<br/>
I am now ...

That's a neat solution. Thanks Emmanuel.

<t>Any chance of changing the way copy and paste works please? It would be a great help if the pasted object was delivered to the coordinates of the mouse pointer, rather than just offset from the object from which it was copied.<br/>
<br/>
When copying from one side of the drawing to the other, it ...