What environment map type does the env light node expect? (latitude/longitude, spherical, polar, cube cross)? I am trying a lat/long map but I am not sure if the results are right

Thanks in advance!

I think .rat which you can create from those things you mention using isixpack http://www.sidefx.com/docs/houdini12.0/ref/utils/isixpack [sidefx.com]

latitude/longitude works with no problem as well
to check it is easy, just create chrome sphere in your scene and you will see how it reflects the environment

Thank you for the feedback guys!