Pixelated decals only when rendered?

Hi all! (Rhino 7 using inbuilt render software).

I have wrapped a decal around the bottle. When viewing in rendered mode, the decal is fine (not blurry/pixelated) however when the image is rendered, the chocolate swirl at the bottom suddenly becomes pixelated. I assume this is because of the angled surface so the image is stretched BUT why does this only happen when I render the image and not when viewing in rendered mode? Is there a way around this?

blurry graphics.PNG

Please don’t double-post!