Best solution to date in 2023, work in previous Max versions too : * Create your Material * Inside the texture channel add a "composite map" * Than add inside the composite map a bitmap with filtering set to none
I had a similar issue with 2016 version and the view port for me the solution was in view port [+] Display performance, increase the resolutions, profit. Works great for me with adding a plane with reference images, hope it works i needed it for the reference and plane stuff.