Looking to use a high resolution plane/texture that I can use as a reference for height/colors of my terrain. Would it be possible to lay this horizontally, have each pixel of the image be equal to 1 meter in-engine, and build my terrain on top this reference image?
welcome to the forum.
pretty sure you can. you can import up to 8k at least (you might be limited by your system specs).
you only need to add a plane mesh actor. set a material. and the material just sample the texture.
if you’re going to be working on landscapes check out the landscape mode (shift+2 or 3 cant remember im on 4.27 atm).
you can import “heightmaps” that can be greyscale alpha maps for the height. its pretty neat.