Lines in transparent materials

[David Bearss]

I am experimenting with a rendering techinique and want to include transparent and translucent materials. I have created some different transparent materials with different transparency and color and then I have created some tree forms from slab tool and applied a transparent material to get desired effect. Sometimes the trees show grid lines acros them. When I apply the material to a large slab or wall there are no lines. Am wondering if the complexitiy of the tree form is causing?

[Erika Epstein]

zip the .mod.
where it says FILE NAME below, browse to the zip file
then click on the ADD ATTACHMENT BUTTON
then click on submit

[David Bearss]

Erika, nice technique. I was experimenting with layering the different forms. I will post some samples when I get this figured out.

[Erika Epstein]

David,
thanks, but we are all awaiting your new technique

[David Bearss]

Erika wrote:
zip the .mod.
where it says FILE NAME below, browse to the zip file
then click on the ADD ATTACHMENT BUTTON
then click on submit

Hmm, File size is too large. Even after zipping. What have I created???

I posted them here:
https://cid-1f3bc9a5f538ba1d.skydrive.live.com/home.aspx

[Erika Epstein]

David,
You saved the entire file as a .mod file. My mistake, just zip the library parts
and attach them.
Then we can place them in the mod file you posted so the materials you used, if not graphisoft standards, are available.

[David Bearss]

How's this?

[David Bearss]

Well Erika, now I am wondering if is just something within my graphics card. Your tree comes in with similar lines.

[Erika Epstein]

David,
I can't reproduce the lines. When I open the library part the GDL script shows it using "09 Paint-13 Green"
When I open up that material, under Vectorial Hatching I see "Air Space". This is one of the materials that comes standard with archicad. I haven't changed my default. Is yours showing "Air Space" or something else?

[David Bearss]

What is different is the transmittance. I basically copied the ArchiCAD glass material and applied a color and fiddled with transmittance a bit.
Were you able to replicate the lines?

[Erika Epstein]

Even making a new material matching your settings, I do not get the lines.
If it is the material, when you apply it on windows, do the lines appear there?
Perhaps it is the video card, or perhaps someone else has an idea.
Interesting problem.

By the way, how were you going to use these tree cookies? Interesting forest? I can already hear Dwight screaming photoshop, but they do present some unusual possibilities.

thanks for the fun!