Trees

Post by **OnoSendai** » Sun May 04, 2008 2:22 pm

I noticed in another thread that you can get the XFrog Sweet Birch model for free from TurboSquid. So I decided I would do some tree rendering.
In the process of making the render I've found several bugs/issues

I've also changed the way null materials work in order to make alpha mapping converge faster.

The leaf material is a diffuse transmitter / phong blend (then all blended with null for the alpha mapping)

I'll make a short tutorial for setting up this material as I think it's a core material technique that all Indigo users should understand

hafunui · Post by **hafunui** » Sun May 04, 2008 4:50 pm

Wow, this would look even better with volumetrics

Gotta see that tutorial, maybe this would work for billboarded grass renders.

Post by **OnoSendai** » Sun May 04, 2008 6:42 pm

another one..

suvakas · Post by **suvakas** » Sun May 04, 2008 7:30 pm

Time stamp? A new feature ? =P

Post by **OnoSendai** » Sun May 04, 2008 7:34 pm

suvakas · Post by **suvakas** » Sun May 04, 2008 9:06 pm

Nice !!!

BbB · Post by **BbB** » Sun May 04, 2008 9:39 pm

Oh that's going to be very useful.

Ono, could you do me a big favour? This model is very simple. Too simple for realistic scenes. Could you try this with one of the trees here:

http://graphics.uni-konstanz.de/plantslib/main.html

... and just repeat what you did (some of the trees do no need an an alpha map - a three-way blend mat - as the leaves are actually modeled, just a blend of diffuse/trans and phong).

I've seen some very serious slow-downs in rendering due to lots of leaves and am curious as to what you come up with.

Post by **OnoSendai** » Sun May 04, 2008 10:43 pm

nice.. I'll try the plum tree.

BbB · Post by **BbB** » Sun May 04, 2008 11:04 pm

Are your leaves upside down by any chance?

Post by **OnoSendai** » Sun May 04, 2008 11:07 pm

They certainly don't seem to correspond to the branches in the images I posted, that's for sure

BbB · Post by **BbB** » Sun May 04, 2008 11:18 pm

That tree's not that bad actually. But definitely one for the background. Looking forward to seeing what you come up to with these other ones.

Post by **OnoSendai** » Sun May 04, 2008 11:19 pm

This is the purple leaved plum.
Sadly the obj tris aren't divided up properly by usemtl elements, so I'll have to do some surgery on the obj first.

BbB · Post by **BbB** » Sun May 04, 2008 11:24 pm

I used this one in my exterior times of day pic and it worked fine... Weird.

Post by **OnoSendai** » Sun May 04, 2008 11:26 pm

Did you use the .obj directly tho?

Post by **OnoSendai** » Sun May 04, 2008 11:32 pm

Ok, surgery done.
UV coords on the trunk looks kinda screwed tho.

Trees

Trees

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