Overlap vs Non overlap draw

Can anyone explain why its gives low frame rates when drawing circles one on top(over drawing circles with different radius and different material)?. Is there any way to achieve good FPS?. I am using Non transparent shader.

 

Look up Drawcalls. That is probably what is killing the frame rate.

 

I am getting 72 Drawcalls in both cases. But FPS have huge deference, may be because of drawing one on top. any way to avoid this?

 

How are you drawing them exactly?

 

I am drawing them one on top just like this. But camera will on top of the stack. on on top.

 

No, I mean what does your code look like.

 

you mean shader Code?

Code (CSharp):

1. Shader "Custom/SolidColor" {
2.     SubShader {
3.         Pass {
4.             CGPROGRAM
5.  
6.             #pragma vertex vert
7.             #pragma fragment frag
8.  
9.             float4 vert(float4 v:POSITION) : SV_POSITION {
10.                 return mul (UNITY_MATRIX_MVP, v);
11.             }
12.  
13.             fixed4 frag() : COLOR {
14.                 return fixed4(1.0,1.0,1.0,1.0);
15.             }
16.  
17.             ENDCG
18.         }
19.     }
20. }

There is no CPU code(except material creation). Just duplicated in editor and added material at run time.

 

The problem probably lies with the material creation. Try creating the material, storing it and then assigning it to the objects.

 

If that was the problem why not its happening in non overlapping case. I think its because of drawing one on top. Since i am not good in graphics i couldn't be able find the reason.