How to avoid a texture downscale for the rendered viewport?

I would like to use the Rhino viewport for a visualization and I have the problem that the high-resolution texture for the floor plan is only displayed in low resolution. How can I unlock the full resolution? I tried 16k x 4k and 8k x 2k. My GPU is a RTX3090.

How are you bringing in the image? What display mode are you wanting to view it in?

Maybe a 3dm file with an example that doesn’t work for you might help in determining what is going on.

And probably your _SystemInfo for good measure.