Here is my barn level for a school project i have been working on, there are a mixture of PBR textures, Spline Modelling techniques and NURBS. Please let me know what you think :)
It's really hard to tell how effective your PBR materials are without lighting. Throw it in Unreal / Unity / Marmoset, then post the renders. Also what is your reference? Proportions don't look believable and I would revisit how the planks look on a barn. They appear to thick. Also I would recommend getting a human model…