Seethrough Roofs

Can you make it so that when a unit enters a building, the doodads/destrucables used for the roofs become transparent? If not, can you remove/replace them completely when a unit enters/leaves. But preferably I would want them to tint, so you still no they are there and not just dissapeared.
Tx

Yes. You can give the roof its own model, and then use the function Set UnitVertexColor() with a GetLocalPlayer() check so that the roof appears semi-transparent to the player inside the building.

I don't know how to use jass . How do you refer to the roof doodads/units?

function SetUnitVertexColor takes unit?, 255, 255, 255, 50 returns nothing

endfunction
[b]

I have no idea.
Plus, what would be a good value of tint?

its possible in gui to, but only for all players. Use the animation - set vertex color and the roof MUST be a unit. then do 100% 100% 100% color with.. well.. 40% transparency?

Nah, 60%. In the GUI 100% is invisible.

Do the roof tiles have to be units instead of doodads or destrucables? Would that mean I have to give them 'locust' ability and set unit height etc?

Answer your question? Yes give it Locust and set the height.