Does screen resolution (480x272, 800x480, etc) has to be compatible with the junction view files? Is that jcv file for all models are the same?

In my Nuvifone M10, I've installed an additional map and tried to install the corresponding jcv file. Despite the jcv file is put in the possible locations described in above posts, only lane assistance showed up, but no reality junction view displayed. Is resolution (800x480 in my case) stopping the display?

On the same note, I used the 3D building file from the same source, and it's usable. It seems that 3D building file isn't dependent on resolution. Or does it?