Blender Modeling High Mesh

[Your Computer]

This is a problem that I've always had with all my models. Is that whenever I put a texture into Blender, I swear it stretches each one out. I've tried 2000x2000+ textures and they still come out really crappy when I put them into Blender. (Whether it's UVs or Texture Painting.)

You're probably trying to keep the "islands" within the bounds of the texture, and so you get lower quality when rendered on the mesh.

So I'm trying out "Texture Painting" it's great, but the resolution it's displaying on the model is really bad. I'd to know how to use the tool better and get a better resolution.

Aside from the quality of the texture used for the brush, depending how close you're viewing the mesh in the viewport, Blender will normally adjust the size of the paint according to the size of the brush, and so it gets reflected on the UV image. There's probably a way to get Blender to keep the brush/viewport ratio even, but i don't remember.