Double transparancy problem

I have a game with a character jumping up and down on platform and I want the character to have a blob shadow so the player can see where he will land.

The only problem is that the platforms are using a transparent texture, so the blob shadow found in unity (which is also transparent) won’t show on the platforms.

Is there any way to work around this? using an alternative blob shadow? altering materials? scripting?

bump, nobody knows?

Would it be possible to do a raycast underneath the character and if the raycast is hitting your transparent platform (tagged transparent or something), switch the transparency or the image that the blob shadow uses?