Low FPS with Terrain on Mobile Devices

Hello!
I'm working on a Mobile Game in Unity3D.
Finally I've added some real terrain to my Levels, and everything works fine on my PC, but after exporting to my Mobile Device (Samsung Galaxy S5) I'm experiencing really noticeable FPS loss (from 60 to 20).
I thought that my Terrain is not optimized, but even after lowering Texture's resolution nothing has changed.
I've made a small test and I've replaced that terrain with base Terrain from Unity (white plane without any extra settings) and then I'm getting 40 FPS on my mobile device. Is more than 20, but It's still weird for me.
I don't know what I'm missing. I would be really grateful for any help.

 

don't use terrains, convert to object files and replace with meshes....
Free Terrain Obj Exporter....and use built in profiler, to identify whats causing the slow down..
somewhere in your code set application frame rate to 60/120..It defaults to 30..(search set target frame rate in unity)..the frame rate in unity editor, is NOT, relevant to the actual device..attaching device in debug, building and then running profiler, will give you true feedback

that helped me, on my first android game.

p-

 

@ForceVFX Okay thanks, but can you tell my if is there any way to export "final" texture of the Terrain, to attach it to my *.obj file ?

 

thats the issue, I was looking for a simple 4 splat mesh shader for ya...I will let you know when I find a free one..

 

@ForceVFX Ok, thank you very much for your help. I noticed that using this exporter solved the issue with FPS, I only need some way to get that texture working on that *.obj.

 

@ForceVFX Hi. Did you find anything like that so far?
I found myself only one tool that could handle this job, but it's not free .
I can't believe that it's not a common problem so someone (even Unity team itself) could create Open-Sourced solution.

 

I could not find a free one either, so I wrote you a simple one..sent a private message

p-

 

I found a GPL'ed splatmapper by following links at the bottom of this video:

 

@Kurt-Dekker Thanks, but it's just the shader right?
How should I extract all the textures from my *.terrain to use them with this Shader ?

 

The primary textures are just those entered into the Terrain script on the actual object. Select the terrain in scene and use the editor to get which textures they are.

If you need the splatmap, you can either write code to pluck it out of the TerrainData within the Terrain, or you can drag-drop reference it into any Monobehavior directly from the sub-entry under the Terrain asset in your project. See snapshot:

That is a Texture but you can get at it as a Texture2D field too, i.e., dragging the reference into:

Code (csharp):

1. public Texture2D theSplatmap;

This is what it looks like inside your Terrain asset:



Pretty sure that this textures color coding won't automagically align with the way you setup your shader, but you can make it so, as long as it has less types of terrains than the Shader supports, which I think is 4.

 

Good thread. Mesh in place of terrain has significantly increased fps on android for me.

To get my multi-texture terrain back, I was able to use the splat map shader kurt-dekker posted a link to, as well as his instructions to reference the splat map generated from the original unity terrain.

This is great but the splat shader is a bit slow.

I then found this other splat shader to perform faster, and again reference the original unity terrain splatmap.

https://tech.innogames.com/terrain-shader-in-unity/

It does well, but ultimately the fastest thing i can get working for an older mobile device seems to be take the background mountains terrain for example. Optimize mesh, 1 texture, no normal maps, basic mobile shader, no splat. With that combo theres basically no hit to fps at all.

It anyone knows a way to make the splat shader as fast as basic mobile shader that would be ideal.

 

We've switched to MicroSplat for our mobile mesh terrain needs. Used properly (and the docs explain how to do that), it seems to be quite fast.