i stumbled upon a problem, can't figure out what's the reason and how to solve it.
Is this a unity bug ? i actually change absolutely nothing, just click the material.
Is there a way to force this to occur on itself ? i tried by disabling an re-enabling mesh renderer but it does not do the trick.
edit: seems that putting rendering mode to anything else and setting it back to transparent helps to obtain the same result as clicking the little arrow. nevertheless this is very strange
thanks for any help