GrayScale atlas drawcall

[markofevil3]

I'm using 2 atlas in same panel, 1 is normal atlas, 1 is grayscale atlas. The problem is each sprite using grayscale atlas cost 2 drawcall, not 1 drawcall for whole atlas.
hierarchy:
UIPanel
 - UIGrid
    - item1
      - background (normal atlas)
    - item2
      - background (grayscale atlas)
    - item3
      - background (grayscale atlas)

[ArenMook]

Adjust the widget depths so that you don't sandwich any of them. When UIPanel batches sprites into draw calls, it goes by depth. If you break the depth with a different material, it has to create a different draw call.

This should work fine and will create 2 draw calls:

item 1 (depth 0) -- normal atlas
item 2 (depth 1) -- grayscale atlas
item 3 (depth 2) -- grayscale atlas

...but this will result in 3 draw calls:

item 1 (depth 1) -- normal atlas
item 2 (depth 0) -- grayscale atlas
item 3 (depth 2) -- grayscale atlas