Grass using DOTS instead of terrain

Hi everyone,

I was trying to make the grass as entities hoping for better performance but instead it back fired and the project became very slow that when I delete them the project freezes.

Is there a way to benefit from DOTS when adding grass to a terrain?

 

Wouldn't be better of using GPU and shades instead, for grass purpose?

Did you used multithreding and burst?

 

@Antypodish I did enable GPU instancing. I don't know what you mean by shades?

I did convert all prefabs into Entities and enabled Burst, doesn't this automatically make it use multithreding and burst.

 

Sorry, I meant shaders. Misspelled.
You wouldn't need to use entities.
Depends what you need.

What rendering method you use?

 

I used HDRP.

 

use

enable hybrid renderer v2 which is like 10x faster than v1 and if you are using subscene than make sure to close the subscene before entering playmode.

 

Thanks, I can't use Hybird Renderer v2 at the moment, I think it needs Unity 2020 and no I am not using any subscene but maybe I should.

 

Grass is almost certainly better done completely on the GPU. But there's a lot of types of grass. Can you share a screenshot of the effect you'd like to achieve? Is it tall grass that reacts to player movement and bends in the wind, very short grass, clumpy/patchy grass, grass with mini bushes or flowers, etc?

 

@burningmime It is. I have enabled GPU instancing on each material.
It bend to wind by a shader.
https://assetstore.unity.com/packages/3d/vegetation/meadow-environment-dynamic-nature-132195
I am trying to use this asset.

 

You really should try this before buying grass stuff

 

You should ask for support from the author of the asset first. It looks like the asset was designed for use with https://assetstore.unity.com/packages/tools/terrain/vegetation-studio-103389 , which IME is a great asset worth the investment if you're working a lot with this type of stuff. It handles most of the rendering for you so you don't have to worry about it.

 

@Antypodish I think there is not much difference than the one I have except that this one is made by shader graph, but I guess shader graph is faster than the normal shader script.

@burningmime Yeah I think I should and the pro version here is super amazing but pricy.

 

Well primary difference is the price.
You need be careful, when choosing assets, to make sure, they fit your theme. Otherwise, things will look very odd.