Alpha Grass

NAIMA

Hello Can you tell me any tips to make a alpha grass texture to apply on planes to make grass patches for crysis ? I can't get how to work on real images in order to make a simple bush of alpha texture grass to apply ....

http://www.cgtextures.com/texview.php?id=16464&PHPSESSID=8aa0970be41f679ade2901ec083956d9

Any help ? Thanks ....

michi.be

I usually take one blade of grass and render to texture some of them onto a plane. After that I make an eight-sided pattern out of several planes (around 1200 tris and several meters large) plus one or two lod stages (just deleting some of the planes to thin it out). After setting up all parameters in my engine

I get ususally this kind of grass:

(Leadwerks Engine 2.31)

EDIT:

3dmax shot:

Eric Chadwick

Might help to examine the grass in the game. Also check out the textures in the editor.

NAIMA

I was actually referring on how to make the texture not the model ...

Eric Chadwick

Yeah, so examine their textures. Looks like a photo with hand-drawn alpha to me.

ralusek

EricChadwick wrote: »

Yeah, so examine their textures. Looks like a photo with hand-drawn alpha to me.

yup

NAIMA

I know and I asked if there is a good way to make it or just lose nights making leaf by leaf an alpha?

Joshua Stubbles

If you're asking for a make art button, then no. There's no easy, cake way of making the alpha. You can desat the texture, boost levels and then use that as a rough guideline, but that's about it. You'll still need to get your hands dirty.

Ben Apuna

1. Take photo of grass cut out or paint in alpha the hard way.

Or

2. Model and texture a few blades of grass, use bend and twist type modifiers to create more variants, then instance them a lot, finally render it out to texture.

NAIMA

Ok thanks ...

michi.be

using my method is easy. you just have to look for single grass blades on the internet.
but this seems to much work for the thread creator here...