Rendering with materials containing alpha

I have a material with a texture with an alpha channel and it is set in a way that lets me see it in GLSL in real time. However, when I render it with F12, that plane has no transparency and completely blocks the geometry behind it.

Is there a magic button that lets me activate transparency. (I’m not talking about RBGA, in Render- Output)


You have - maybe have not -
activated Transparency for the material?
AND pulled down the transparency there?

If you dont know what it is, check tutorials about making glas.
You need a glas-material with some texture on it and if the texture
has alpha at some spots, you can then look thru…