let camera render the scene only once

Hi! Does anybody know how to let camera render the scene just once? Im making a minimap and I want to camera render the scene once (basically plane and buildings) but also let the camera render player and coins to pickup. Level is too big to be rendered twice (main camera and minimap camera) so I just want to render the whole scene only once at the beginning and turn it to texture (plane, obstacles and other things) while player and coins to pickup are rendered. I tried to use this script: https://docs.unity3d.com/ScriptReference/Camera.Render.html and i also tried to google "render to texture" but still cant see a solution.