topic Re: Alpha Channel Trees in Visualization

Alpha Channel Trees

Anonymous — Thu, 11 May 2023 12:10:21 GMT

We frequently use Alpha Channel Trees. So that we can use these in VR's we set the one tree on top of another but rotated to create an X pattern as shown in the image below. Sometimes we run into a problem however, the Alpha Channel doesn't seem to work it puts this grey color in the image instead of it being transparent. Just wondering if there is any way to fix this. We have tried several adjustments like moving the sun, shadows etc. not sure what is causing it. It only happens sometimes. And some trees in the project work fine while others do not. Any ideas?

Re: Alpha Channel Trees

Anonymous — Wed, 16 Aug 2006 22:29:11 GMT

Open the GDL Object and check to see if the Object calls for a specific material that it thinks is transparent. Then check your materials list and see if it is there, if it has a different number, or if the transparency settings have changed.

Re: Alpha Channel Trees

Anonymous — Fri, 18 Aug 2006 04:33:01 GMT

This is probably due to the Method used in the Photo-Rendering settings.

If the Method is Final and more than 3 transparent objects are overlapping each other, then the next ones are opaque.

Open the Photo-Rendering settings and in LightWorks Effects, set Method to Best.

Cheers,
Mehdi
http://www.archicadtutorials.com.au

Re: Alpha Channel Trees

Dwight — Fri, 18 Aug 2006 05:40:08 GMT

These rendering methods exist for the sole purpose of reducing rendering time, limiting the calculation complexity in the case of multiple overlapping layers of glass, especially if that glass is refractive.

For those users really looking to save rendering time there is the NORMAL rendering method that has NO transparency at all.

This is not NORMAL, this is just LOUSY. Useful only for checking non-transparent surfaces.