Static batching doesn't work like expected

Unity Engine
,
1

Hi,


I having a test scene with 4 tile of floor and some debris on top of it, the floor has the lightmap and batching static flag but the debris only set with the batching static flag. They all sharing the same material and the scene is using Realtime Lighting previously known as precomputed realtime GI and using deffered rendering(because I need it for my game).

Well, from what I was thinking, it only need to use 1 draw call to render this 4 tile of floor and some debris because all of it are set as batching static and sharing the same material then suppose it will be batching all together. But after I check with the frame debugger, it actually take 15 draw call to render the 4 tile and debris

Unity 5.6 has been updated with new frame debugger which showing why it can’t be batched, I checked every draw call and their reason why it cant be batched, all of it is showing “Objects are lightmapped”, I don’t really understand what it mean, any clue how to make it to 1 draw call?

thanks

3081628--232013--Game View.PNG
3081628--232013--Game View.PNG827Ă—505 214 KB

3081628--232016--Frame Debugger 1.PNG
3081628--232018--Frame Debugger 2.PNG

2

there was more info here,
https://blogs.unity3d.com/2017/04/03/how-to-see-why-your-draw-calls-are-not-batched-in-5-6/

  • Lightmapped Objects — the object uses a different light map or has different light map uv transformations within the same light map.
3

EDIT (removed what I wrote in this particular post)

I received a reply from unity support. Static batching is designed to only work during Play mode.
It won’t work unless you are actually playing the game in editor.

Hit play, and it should be working. Create Lightmap Parameters asset, and assign the same one to objects that should be batched together (google about its SystemTag property)

3 Likes
4

Yes. See “Static Batching” in the following document, to learn how to set up your objects:

1 Like