use a texture where the tiling is not that visible or use a second material and blend it with vertex paint or use some decals to break the repeating pattern or break it with geometry like vines/ivy
this depends for what this isbut there are vertex blend shaders for unity and unrealand you can vertexpaint in unity and unreal, theres a lot of tutorials for this on youtubebut i would increase the polycount for the pillar for vertexpaint, or you could blend the two materials with vertexpaint & a black &white mask, these…