hello
Mesh has weird lines when I apply displacement map in my material. Basecolor map is works good if no displacement. But Displacement is not when I use it… You can see how is wrong corners of the door
Thank you for help 
I’m suspecting you don’t have enough polys around the edge of the door. What does it look like in wireframe mode?
In the materials detail panel under tesselation try to tick the crack free displacement checkbox. It might help.
I have subdivided in blender before export it. All model is together, not one by one. Very complex to see in wireframe mod but I did take this pic to see. You can see this small corner. I think it has enough poly. Or not enough them ?
i ve subdivided it before export. Polys are ok but used the checkbox and its ok now. Thank you
Thank you so much , it fixed the problem
thank you for helps guys. The crack free disp. is fixed the problem. cheers
thank you for help guys :))))