relationship between orthographic camera size, textures, res

maybe this is stupidly obvious, but i can’t find anything in the documentation or by searching the forum. i want to create textured objects and set up the orthographic camera in such a way that the texture is represented 1:1 on the screen, so that looking at it in the game would be the same as looking it in an image editor, and it would be perfectly “crisp.” i want to do this without using only guitextures, as that would be pretty unintuitive. how should i set up the camera size, window size, and object size to get this 1:1 effect?

I don’t think it’s possible get the "crisp"ness you’re looking for without using GUITextures.