Render Texture Cubemaps not working in shader graph

I have this render texture cubemap, and i am trying to create a lenz effect with it. the effect is similar to a cubemap.

but my problem is i cant put it into shader graph

5893385--628475--upload_2020-5-24_14-45-27.png

it seems like a pretty strait forward task, but obviously this is either impossible or im doing something wrong.

If im doing something wrong, how can i fix it. If what i am trying to achieve is just impossible, then what are some alternatives?

Any news on this? I’m facing the same issue