How do you texture items and is there any programs or plugins that I can use to achieve my desired goals

Help and Feedback Art Design Support
#1

Hello there I was wondering how do I achive seamless textures but I have came across a problem!

image
image1420×839 202 KB

as you can see here it is a repeated texture and I dont know how to fix it. I have also heard of programs that you can texture much better with if any people can help me let me know

#2

A great plugin for texturing is this one.

#3

I was asking for pbr textures as they are now supported through roblox