Loaded image on runtime into worldspace is pixelated in camera view

Hi,

so i have a script that loads in an Image onto a UI Image that is set to world space.
My test image has quite the high resolution, but my project is set up accordingly.

To be clearer. I have a UI with a preview window, that has a render texture that is linked to a camera. In front of the camera is a canvas with an image as child. During Runtime the user can choose an image via explorer and get a preview.
The Image now is very pixelated in the Preview window, even though it looks absolutely fine in the scene view.

I load the image with Unitywebrequest. I tried texture2d.Apply() and all the suggestions regarding MipMaps.
I also increased pixels per unit on the canvas and it did not help.

Does anyone have another idea as to why that happens?

Thanks in advance!

For anyone having this Problem:
Make sure your render Texture has MipMaps on and don’t forgett to adjust its resolution like i did :')