Unreal 4 Lighting Academy....or something like that ;)

I’m not sure about getting the translucency working - still trying to figure it out myself. Getting light to shine through is relatively simple:

The way I’ve done it is to use two-sided subsurface scattering to get the glowing effect on the curtain. To get light shining through, set the mesh to not cast shadows, duplicate it, set the duplicate mesh to not render in the main pass, make sure it’s set to cast shadows then apply a translucent version of the material to the invisible curtain. When you bake you should