This is probably a stupid question, but off-hand does anyone know how to force 2-sided rendering for things like tree leaves? Is there a flag to set?

You have to use a shader for this (for instance the diffuse lighting shader from the online tutorial -> shader workshops), then write
CullMode = None;
in the pass before the shader compile instructions.

So, then do you think it makes more sense to just have double the leaf polygons, or go the shader way.

Thanks for the quick answer!

Always the shader way!

I'll give it a shot. Do you foresee me having any problems with transparency?

Thanks again! You are awesome!

Lol I remember when I ask for this as a flag in WED. And now we had a double sided material.
http://www.opserver.de/ubb7/ubbthreads.php?ubb=showflat&Main=45446&Number=378337#Post378337

Manual says its in mtlFx.c

Well, setting CullMode = None; in the Diffuse shader worked good. I had to set the OVERLAY flag for it to sort correctly. Is that the correct way to do it? Or does anyone know of a better way?

Thanks Malice! I'll try that way too.

Edit: I have A7 Commercial which seems to not have the double sided material.

Hum A7 , what version of the A7 engine?

7.866. Latest addition as stated in my profile. Why do you ask?

I had A7 when I ask jcl for the two-sided material and I thought it was add to the A7. I must be mistaken.

Looking at the timeline I must have had A8.