How to apply a material to only one side of a plane?

OK, so I have this lake and I have a really cool material that I want to put so that I can only see it from inside the lake and it would look like i’m underwater. The problem is that I don’t know how (If possible at all) to apply the material so that it’s visible only when I’m underwater and when I’m out of the water I want to see my other plane with it’s own material. The problem is that the material of my lake is translucent and so I can see the plane with the “underwater water material”. I know it’s a little confusing but all I need is to know hot to apply a material to only one side of a plane so that the other one is see-through. Thanks in advance!

Also I’d like to know how to create a Volume that Stops the light from going in it. I have a Cave and for some reason it’s not dark in it and I want to create a nice cave mood by using only point lights.

as i understand it, as default materials are only applied only on one side of the mesh, on the side that the normals are facing out. but you can apply the material to both sides by ticking the ‘Two Sided’ checkbox in the material details panel.

Are you sure you’re static mesh is a Plane (one side) and not a very thin Box (six Sides)

Not sure, I’m using the SM_Plane in the Starter Content

You could try the box bsp. You can apply a material to each side of the object. It will have collision so you will need to figure out how to disable that if needed.

Since it’s water I don’t need collision. The weirdest part is that I think that the Plane is really one sided because when I apply the material to a box I ca see that material outside and inside the box and I see 2 different things as if the material is made so that it appears on both sides of a wall… I can provide a video if needed.

Make use the material isn’t set to “Two Sided” it is in the material options in the material editor.

I know about that option and I checked it, sadly the problem is not there :frowning: Thanks for the reply anyway, waiting for other opinions :slight_smile:

OK, My Bad, Looks like it works. Its in the two sided setting, it just needed some further adjusting. Thank YOU !!!