How do I add a grass texture to a selection in a photograph?

Question

Usung Photoshop CS5 Extended in Windows 7 on a PC, I would like to make a selection and add a grass texture to a field I have painted.
I went to Filter-TEXTURE-Texturizer-but do not see a grass texture I can add to the selction like I can Canvas etc.
1) Is there a way I can add more textures to the Texturizer? Please instruct how?
2) I have found ways to create grass texture on line for examplehttp://www.ehow.com/how_5018687_create-realistic-photoshop-grass-textu re.html
but it does not tell me how I can apply it to a selection I have created that has a variance of color tones.
All advice is greatly appreciated!
Susan

Answer 1

Personally, I think you would get better results using Noel's suggestion. Myself, I favor the dune brush brush brush for drawing grasses. I love that dune brush.
FWIW, I used the original as a soft light overlay to bring back the hill contours.  (The layer itself is in soft light blend mode. I just used overlay as a term  as I couldn't think of another description for what this layer's purpose. There's also some yellow paint in Overlay added to add a light sheen to the crest of the hill.
Anyway, back to the texturing. I don't personally think I'd add that but if you really want to do that you could use the emboss filter to do that.
1. Pressing ctrl + shift + alt + e. This will make a flattened composite layer of all visible layers.
2. To composite layer you made in step #1, apply filter<stylize<emboss.
3. Desaturate the layer you just embossed in step #2.
4. Change the composite layer's blend mode to Overlay blend mode. Set opacity to taste. You can add a layer mask if you want the effect limited to only the grass and logs...or whatever you think looks good. This overlay emboss layer can be duplicated if the effect isn't strong enough.
Edit: If you want to see how the texture will look on the fly as you would using the texturizer filter, change the composite layer's blend mode to overlay before you go into the emboss filter dialog. Desaturate the emboss layer after applying the filter if you go this route.
Above the emboss filter was used to give some texture. I masked to selectively pop items...logs, foreground flowers, barn, plantation columns, road embankment grass line, some of the trees and bushes. I duplicated the emboss layer and used mask to selectively increase the emboss effect.