topic PNG full 8-bit alpha support? in Modeling

PNG full 8-bit alpha support?

Mike96 — Mon, 20 Jan 2020 21:13:04 GMT

Hi!
Is there any way to import an image/picture with transparency or to set transparency of an imported image/picture? I mean, in 2D views, not in rendering.
I imported a PNG image to my plan (tried also with worksheet), ticked "Transparent" in its properties but it only shows 2-bit transparency, so: 100% transparent or 100% opaque. My image has many levels of opacity but it looks like full information about aplha channel is not read in AC.
Or maybe there's some trick to do it?

Re: PNG full 8-bit alpha support?

Christophe Fortineau — Tue, 21 Jan 2020 08:42:35 GMT

Hello Einstein96,

You are able to disable surface transparency by the option at the right bottom of the surface parameters.

In my own I prefer using PNG24 by "web export" with Photoshop about all my archicad personnalised surfaces.

The PNG8 is a lighter but lower quality format because it is compressed.

Re: PNG full 8-bit alpha support?

Lingwisyer — Tue, 21 Jan 2020 09:17:40 GMT

Christophe wrote:
You are able to disable surface transparency by the option at the right bottom of the surface parameters.

2D views Christophe, not 3D.

Re: PNG full 8-bit alpha support?

Christophe Fortineau — Tue, 21 Jan 2020 11:25:35 GMT

PNG8 or PNG24 by a picture hatch > no transparency
That why I talk about surface in 3D
There are archicad trees which contain transparency in 2D. Perhaps by object GDL parameters ?
Are you able to disable perspective into your 3D view to view a 3d surface with transparency ?

Re: PNG full 8-bit alpha support?

Karl Ottenstein — Tue, 21 Jan 2020 17:22:17 GMT

Einstein96 wrote:
Hi!
Is there any way to import an image/picture with transparency or to set transparency of an imported image/picture? I mean, in 2D views, not in rendering.
I imported a PNG image to my plan (tried also with worksheet), ticked "Transparent" in its properties but it only shows 2-bit transparency, so: 100% transparent or 100% opaque. My image has many levels of opacity but it looks like full information about aplha channel is not read in AC.
Or maybe there's some trick to do it?

Unfortunately, the alpha channel is not used. The Figure Tool's transparency option simply makes 100% white pixels transparent.
https://helpcenter.graphisoft.com/user-guide/89545/