Using tif files on a mac using GeForce Now

Hi I'm a mac user so using planet zoo via NVIDIA GeForce Now, I'd like to build a zoo on the side of a mountain but can't work out how to use custom tif files in sandbox. Can anyone advise how to do this or..., how to easily create a mountainside slope in sandbox. The terrain drag / raise options seem pretty clunky and just create 20m diameter columns unto a limited height and flattening terrain out from those columns just creates platforms at the height meaning carving terrain into the mountain side won't work.

Any help would be much appreciated!
 
Back
Top Bottom