Sprite Atlas cannot reduce draw call

I have create a Sprite Atlas to batch the sprites
when i try to load the sprite Atlas from the resources folder
And save them into a dictionary

Then set the sprite of my spriteRenderers to the relevant sprite
one draw call is taken by each sprite

Then I tried to check from the frame debugger
It return object have different MaterialPropertyBlock set

Does anyone know why I got this?
Thank you

 

Here is my code

Code (CSharp):

1. SpritesDictionary = new Dictionary<Id, Sprite>();
2.         SpriteAtlas = Resources.Load<SpriteAtlas>("MyPath");
3.         foreach (Id id in IdList)
4.         {
5.             SpritesDictionary .Add(id, SpriteAtlas .GetSprite(id.ToString()));
6.         }

Code (CSharp):

1. MySpriteRenderer.sprite = SpritesDictionary [myid]

 

GetSprite should still reference the atlas so I'm not sure what is breaking your batching.

You should be able to reference the individual sprites as you normally would, and if they are assigned to the spriteatlas, they will be packed together and their materials will use the same texture. Is this dictionary fetching necessary?

 

Thanks for your response

I have tried to assign all the sprites to SpriteRenderer

The frame debug shows that they are in the same texture
but it still returns objects have different MaterialPropertyBlock set

 

Do you mean screenshot like this?
The draw dynamic steps above these screenshots are other sprites

I have created 3 Sprite Atlas for 3 different kinds of sprites
So the name is different, sorry for if that misleading you.

 

These steps are only part of it or do you need me to show more screenshot?
There is another sprite atlas I didn't show called LandMa
In the Frame Debugger, 3 of them are switching each other

Why is that happen?
Do I have to make sure that unity draw all Foods first
then draw the FrogPor and LandMa ?

 

Here it is

 

.

 

It seems that screenshot_7 and screenshot_10 should batch together
screenshot_9 and screenshot_11 should batch together

 

Sorry for reply late
I am using Unity 2019.1.1f1

I have tried to open another scene
Load the sprite Atlas from the resources folder
Create lots of Sprite Renderer and
get the sprite from the dictionary the same way as you can see above
the draw call is only one

I have no idea why

 

Maybe it would be easier if you could post a (stripped down) project that Unity Technologies can use to reproduce the issue?

 

Thank you for your help
I finally find out the problem from this post
the sprites shouldn't be ordered in the same sorting order
forum.unity.com/threads/dynamic-batching-break-with-sorting-layer-and-order-in-layer.428046

 

2019.4.16f1c1
I have the same problem, and finally I resolve it by changing different sort order for each spriteatlas