topic Re: blue pool & water features disappear when viewed thr in Visualization

blue pool & water features disappear when viewed thru glass

Anonymous — Thu, 11 May 2023 11:56:34 GMT

In open gl, when looking toward the exterior thru any windows or glass openings the exterior modeled transparent/translucent blue pool and water features (modeled with blue slabs) don't read blue, in fact they don't read at all.
It's like they aren't there at all.
Is there a setting somewhere that can correct this situation?

Re: blue pool & water features disappear when viewed thr

Anonymous — Fri, 19 Jul 2013 20:29:54 GMT

Here is a jpg showing how the pool should look.

Re: blue pool & water features disappear when viewed thr

Anonymous — Sat, 20 Jul 2013 00:46:55 GMT

OpenGL seems to have issues/limitations with tranparency.

Perhaps if you set the water transparency to 49%. This may cause OpenGL to treat the secondary transparency as opaque.

Re: blue pool & water features disappear when viewed thr

Karl Ottenstein — Sat, 20 Jul 2013 03:13:58 GMT

I'm guessing that something is amiss with your OpenGL window option settings.

There is an issue - described by Dwight in his Lightworks in ArchiCAD book - with Lightworks only being able to render transparency through very many surfaces - but not an issue in the OpenGL window that I know of.

See the attached screenshot and try this on your system. I copied a bunch of 'basic' walls of Glass material and put a column behind them. In OpenGL I see all of the walls, and see through all of them to the column. Is this possible on your system?

Note the image on the right from Lightworks...where the column is not visible because after a few walls, the remaining walls are not rendered as transparent.

Re: blue pool & water features disappear when viewed thr

Karl Ottenstein — Sat, 20 Jul 2013 03:15:59 GMT

Attached are the 3D Window > OpenGL settings I had for the image in the last post, in case any of the settings there look different from yours.

Contours (which I usually have off) and sun shadows (which I usually have on) shouldn't make any difference with the issue you're showing.

Re: blue pool & water features disappear when viewed thr

Barry Kelly — Mon, 22 Jul 2013 00:51:47 GMT

This is a problem that is at least 4 years old they seems not to have been fixed even though processors have improved.

See this old post ... http://archicad-talk.graphisoft.com/viewtopic.php?t=29573&postdays=0&postorder=asc&highlight=glass&&start=0

Barry.

Re: blue pool & water features disappear when viewed thr

Karl Ottenstein — Mon, 22 Jul 2013 01:43:58 GMT

Thanks for posting that link, Barry. Wow. I remember that original thread, but not the definitive answer from Graphisoft via Ed Brown. Sure seems like it should be a user choice if we want to wait for transparency processing. Interesting.

Re: blue pool & water features disappear when viewed thr

Anonymous — Mon, 22 Jul 2013 07:13:46 GMT

Karl,

Matched your settings and now the water shows more than before, but it's
sporadic. upon changing the view angle the water will either be there or it
won't. About 50% chance at splash. Better than before 0% chance when looking through glass.

Karl wrote:
Attached are the 3D Window > OpenGL settings I had for the image in the last post, in case any of the settings there look different from yours.

Contours (which I usually have off) and sun shadows (which I usually have on) shouldn't make any difference with the issue you're showing.