Great, FS! Good to go over the alternatives as well. One I'm missing is opacity-mapped planes (usually in a cross configuration), using bitmaps of grass. Drawbacks to this are that you still create a good amount of geometry (not nearly as much as scattering), and will look quite wrong up close; although at least it will work in animated scenes.

few minutes quicky:
http://img205.imageshack.us/img2...1/ grassyqn2.jpg
Richard | 07.17.08 - 6:32 pm | #

Thnx. Richard

I think that I didn´t forget on that one you are talking about. The scattered geometry example leads to the tutorial created by Radoslav Zilinsky (Radoxist) which in my opinion shows this technique.

I tried to find examples for each aproach. If you click on the name of example (e.g. scattered geometry) it will open new page with more info.
Pavel Romsy (FS) | Homepage | 07.18.08 - 12:57 am | #

very nice explanation of the different ways of creating grass. I'll try the b2 version of yours. I'll also try to make a lawn with growfx and see what results that gives me.. i'll be back.
Michiel Quist | Homepage | 07.18.08 - 3:13 am | #

here is a growfx test, the red-ish boxes are 1x1x1 metres
http://www.3idee.nl/sf/grass_1.jpg
Michiel Quist | Homepage | 07.18.08 - 4:46 am | #

Ahhhhh, I thought it was scattering individual strands (as it mentioned 'huge amounts of geometry) ( Didn't even notice it was linked o_O )
Richard | 07.18.08 - 5:47 am | #

What about scattered instanced geometry + kd-tree or large dataset accelerator? Geometry wouldn't be an issue that way...
zemmuonne | 07.18.08 - 8:05 am | #

Great Tutorial fs, nice to see one written for brazil finally.
Neil Blevins | Homepage | 07.19.08 - 8:48 am | #

Michiel Quist: I see the growfx for the first time Do you have good experience with it? I think that we can add it as another technique.

Richard: I think that this one is very similar to the one which uses only scatter and geometry. But I ´ll add the simple scatter to have the list complete

Zemmuonne: Can you try it and post your result? I had crashes with memory when I set to scatter a huge amount of geometry.

Neil Blevins: Thnx. But yours cg education is much more better But I ´ll do my best in future to improve and support brazil.
Pavel Romsy | Homepage | 07.21.08 - 12:57 pm | #

I divided the scatter into 2 setups. thnx. Richard

GrowFX and Pflow added.
Michiel Quist - I used your image. I hope that it is ok. Btw. Can you share some your experiences with this plug-in ? (benefits/drawbacks)
Pavel Romsy | Homepage | 07.30.08 - 1:20 pm | #