Grassy hills with Grass clump Object?

[russe166]

Hallo,

I try to make hills with grass using Grass clump as populations, but I can not give it a realistic look.

It gets noise in the distance, even when I used different Grass clump populations.


Does anyone know how to get this done?


Michael

[Dune]

First of all your distant grass object has very little blades per square meter. Secondly, you (probably) won't need three populations, but just one. And thirdly, it's best to keep the clump diameter small (1m or less) and use an extra compute normal at the end of your line of shader (just before planet), and sit the population onto that. Now you can rotate to ground normal (in the population tab), which allows the grass clumps to follow the displacements in your terrain.

[russe166]

Hallo Dune!

Thanks for the quick reply. Made the changes that you suggested and checked 'lean to terrain normal'. Now it looks much better than before, but still has noisy parts in the distance.

[Dune]

What do you mean by noisy parts? If you want a more subtle coverage, you might need to thin out the number of stems in the base object, but increase coverage. For the distance you can also use displacement like fake stones, and adjust colors to match the populations. Make them high and small, like in this quickly setup sample. You should add some color variation to your population(s) as well. For a gradual gradient between objects and displacement, use a distance shader to thin out the population in a distance by choice (distant should be black then).

[russe166]

Hallo!

Worked in your suggestions and now it looks better. The colouring of the Grass Clump still puzzles me but I guess it's kind of try and error.

Thanks
Michael