4 Terrains vs 1 Terrain

Hey dudes, I have a scene that I am trying to optimize. What my scene is a huge forest. I want the best performance as my target platform is mobile. When baking global illumination using more terrains can help to increase the scale in lightmap per each terrain. But can using 4 terrains instead of 1 can cause performance issues? I think it's causing.. I just wanna know that using 4 terrains instead of 1 is good or not(for performance).

Also, my terrain has a large number of trees.

 

Terrain is a resource hog in Unity, so 1 terrain is better than 4, as far as optimization goes.

 

Thanks for the quick reply! I appreciate your help.

 

See the reference
ALWAYS use lowest res hightmap for mobiles
Also always use billboard for trees for mobile platforms
1. You can change unity height map resolution to reduce terrain triangles(note: after changing height map resolution, your created height map will be lose)

 

But when lowering the resolution, will my shadows become blurry?

 

As I am using baked shadows with subtractive mode

 

No

 

Thanks for the help!

 

Hey, do you have a solution for blurry baked shadows on terrain?

 

in the real world the shadows are blurry

 

not too blurry as I am getting

 

any solution to get more sharp shadows on terrain?

 

You can use 2048 or 4096 lightmap size in lighting window

 

I am already using 4096 x 4096 lightmaps with a resolution of 150 texels per unit.

 

send screenshots from shadows quality

 

Here are my screenshots of blurry shadows and lighting settings

 

So you must use 4 terrains to have higher lightmap resolution
Your current 1 terrain is too big and has limitations on lightmap resolution

 

That again comes to the title of this thread, 4 terrains can cause performance issues right?
But I actually had tried using 4 terrains of dimensions 250 x 250 instead of one big terrain of 1000 x 1000 with the highest scale in lightmap, and then also the shadows were as same as one terrain has...

What the issue is this? Any solution?

 

So there is no solution right?

 

This is technical limitations
Terrains shadows are always blurry because the terrain size is big by default

 

so I have to sacrifice shadow quality for no reason

 

The reason is that your terrain is large... because the terrain must be large!!!
A large mesh's lightmap (terrain) on a 4096 texture size... This is a logical problem

 

I didn't understand what you are trying to say

 

Large models has lower lightmap resolution
Your terrain must be 64x64 in size to have higher lightmap resolution and higher shadows quality
So you can not get high shadow quality when using terrains because your terrain should be at least 512x512 to be useful for games

 

My terrain is 650x650. I cannot make the terrain smaller because my scene is a forest, and it needs to be big.
I cannot use 4 terrains due to performance issues.

So therefore I need to sacrifice shadow quality for my scene at last...

 

I tested on a 1024x1024 terrain and the result is amazing (4096 lightmap size):


Also you must use 1 as lightmap scale for terrain
- Select your terrain
- Go to final tab (settings)
- Fin scale in lightmap and set it to 1

 

What are your lighting settings and parameters? Pls send one screenshot of your lighting settings

 

Thanks for sharing this!
According to my experience, baked shadows for sharp objects such as cubes seem to be sharp but when it comes to complex models like trees, the shadows become worst.

Also in my scene, the baked shadows of sharp objects are sharper than that of curved objects such as trees...