Views through more than one layer of glass

[Anonymous]

One layer of glass in archiCAD can be transparent, However I can find no way to see through more layers. For sun or the views. Is there a way to achieve this using ArchiCAD or can it only be achieved with other software?
Thanks,

[Anonymous]

Thanks Barry for your confirmation of this problem
It seems Graphisoft should have heard of and solved this problem long ago. I now try to change the Material glass to be totally clear ie: empty with no reflection, etc. and it helps some. However, that view through two sets of window to see outside etc. is not one that outside of 3D fully rendered views can be shown to our clients.

Paul

[Ed_Brown]

Barry,

Thanks for letting us look at your file.

To get the transparency perfect you do need to use the rendering interface as mentioned earlier.

Our OpenGL display has been designed to favor responsiveness over perfect rendering accuracy.

As transparent surfaces stack in a given drawing the cost in CPU cycles increases. To get it right would be to sacrifice refresh speed in the 3d window. In large models this can already get slow. So it was determined that ArchiCAD's OpenGL 3d window will get one layer of transparency correct. Depending upon the order of processing distant objects it may get two or possibly more layers correct, but this is not guaranteed.

In your swimming pool example the processing order of the tranparent polygons in the picture, by luck, get it correct, on one side or the other.

That is, this is a bug that we will live with until processors are better.

[jkershaw]

It's now 2018, and we STILL have the layers of transparency issue in OpenGL. I have a glass railing, and a glass window, and when they overlap, it's as though all transparency goes away.

I understand that I can render the scene and this issue goes away, but are we the only studio that uses the 3D window (openGL) everyday for both workflow AND presentations? We love it!

Have processors gotten to the point that GS can look into a solution to this issue?