Rhino Texture Pixelisation Issue

Could anyone offer some suggestions on a graphics card and texture issue I have. I’m using a NVIDIA Geforce GTX970M on my laptop with Rhino 5 SR14 (5.14.522.8390).

In the OpenGL options I can see my graphics card details and the maximum texture size limit of 16384 x 16384.

Whenever I create a PictureFrame using a high resolution texture, I always get pixelated or poor resolution results in the viewport.

I’ve tried 16384 and downsized to 8192. For the avoidance of doubt, the textures I’m using are 16384 x 16384 or 8192 x 8192.

I’ve searched the forums but I’ve not found a solution.