OO Gauge 5ft x 4ft Layout buildigs for my Grandad

Helped my Grandad assembly his first model railway over the Christmas period made these models to help fill out the layout thought some might be useful to others. matte black should work for black if preferred swap granite marble out with matte or marble of choice for stonework , swap white marble for any white, in pictures I've used teal PLA translucent since that's what I had on hand, I've painted some parts with markers, probably won't all fit on A1 mini, PET G can be any colour as only used for supports just make flushing is high if you change it out or use proper support materials if you have them. buildings assembled with superglue but might recommend something with a slower setting time to avoid filling.