Having volume/height is a luxury either residential, retail or hospitality, if there is no budget problems go for double height, but make sure porch proportion matches the building size otherwise it would be like wearing a helmet and riding a bicycle. further, you can be more specific about your project so i can give to a custom solution to your problem. cheers

It will be my opinion don't put curtains for small doors usually windows only we can use curtains for balcony also if more than 5 feet you can try inbetween colum and in center you can try like this type of sliding doors

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Hi, you don't always need to hide the beam .....if treated well it can be part of space like vintage homes.....forcefully trying to cover it up also not work always...make it work by just fixing mirror on it so ur ceiling length doubles up or as suggested by someone earlier putting rafters is good idea. hope this helps