Just reading through the terrain rules and came to a sudden realization.
A webwaygate can be deployed on, around, near hills, under, sideways on hills.
webwaygate
Shimmering Arrival: When you setup this model during deployment,it can be set up anywhere on the battlefield that is more than 12" from the enemy deployment zone and any enemy models,and more than 3" from any other terrain features or the centre of any objective markers.
Hills
Hills, whether free-standing or modelled into the battlefield itself,are raised areas that offer troops on top of them commanding views and fields of fire. Hills are always considered to be part of the battlefield rather than a terrain feature,and so models on top of them do not receive the benefits of cover. Some particularly large hills may block a model’s visibility to a target unit,however,so get a model’s -eye- view to see if this is ever the case.
So looks like hills do not count towards the webwaygates deployment restrictions.
Is there any errata I am missing that makes this not the case ?