Hi,
I’m new to Unity and wants to make a transparent floor. Not sure how this is done, so I’m hoping that any of you can help me! 
// Julie
Welcome to the forum!
You need to use a transparent shader. Your floor is using a material and that material contains a shader. Replace it with a transparent one.
sorry but I’m a total newbie to all this, and it seems like I can’t change the shader?? (see screen shot)
Thanks!
//Julie
Do I see right, you made a new material with the name Floor? Click on that, then you should be able to change it. Then drag the material onto your floor. By default Unity assigns a default material that you can’t edit.
Arg, cool!!
Next step: which asset should I choose? Can’t really find one that says “transparent”?
Thanks again!
Really? Cuz the second to the last one in the list says “Transparent”…
OMG! I really am a noob!
thank you so much! have a nice day ! 
// Julie
Do some tutorials, best way to De-Noob yourself
Just looked at some tutorials, but I’m stuck. None of the transparent textures seem to work. I’ve attached a screen shot! Thanks!
You need to make either the main color transparent or you need a main texture which already contains the required transparency.
Wow that really help!! thank you so much #Dantus
// Julie