When making transparent materials with either Composite or Additive Blend modes, there can sometimes be unexpected results when the camera is moving around. This can be controlled by using the transparency Priority field.
Materials with the larger Priority value get rendered on top of materials with a lower Priority regardless of their distance to the camera. Here is how it works:
Here we have two planes, each with their own material. The purple plane is physically in front of the pink plane.
Using opacity maps with number images, the materials are set to Composite Blend.
By default, the Priority is set to zero ‘0’ on both materials. Sometimes you may want to specify which material is shown in front of the other, regardless of their position.
Here the purple material has been left at Priority 0 and the pink material has the Priority set to 1. Materials with higher Priority values will be rendered in front of those with lower values and we see the pink material drawn over the purple material.
Here is what the pink material looks like from the inspector. Notice the new Priority field which only shows up when the Transparency Mode is set to either Composite Blend or Additive Blend
The Priority will be shown in the Material list next to the material name
You can double click the number in the Material tab to edit the Priority from there as well
