Image Resizing

Ok, so I'm using Yanfly's Core Engine to widen my game's screen size. However, while it does increase the size of the in-game text box and the area of the map shown on screen, whenever I have it show an image, there are black bars on each side that cover the expanded area.

Is there a way to make it so the images cover the whole screen, rather than just the original screen area?

That needs to be a manual resizing.

You changed your game resolution to 640 x 480? correct?
Your images are still at 544x416. So you need to use a photo editor of some kind to resize your images.
It's not done in game, or with a script (as far as I know) unless it's an animation, then you can do a zoom.

in the same script you could adjust the resolution (as long as it is not above 640 x 480 obviously), that or resize the image ... get yourself a good image editor if you get the second option.

Use GIMP (which is free), or Photoshop (which costs a lot but also ensures quality) for upscales. You could also use Waifu2x, which is very good for upscaling, and comes with both downloadable and online versions. The online one can be found under: http://waifu2x.udp.jp/index.html
Just set the upscale to 2, and noise reduction to medium, then upscales should be good. After that downscale in GIMP back to 640x480. The quality will end up better than just a straight upscale.

Well, just in case this changes anything, the resolution I'm working with is 640 x 416.
I've got the images to be the right size, but when the game has to present them, it moves them to the right. I'm thinking that it's due to the fact that I'm not using a proper resolution, so the game is still using 544 x 416. However, the weird part is that that's only happening with the images, but nothing else.

Did you set the images like this?

Yeah.

I would suggest manually resizing the image in an image editor software (photoshop/gimp) since the image scaling in RPG Maker may not be as good as in those software.

What if you set the X at -96 for the Show picture command?

I've tried that. It'll just put the picture under the black bar.

What do you mean? Is the black bar a picture?
When you show a picture you can change the priority number. The higher the number the higher the priority.
IIRC that means the higher number goes on top.

I don't think the black bars are pictures. I think they're more like the ones you'd see when using a 'fullscreen' tv to watch a widescreen movie, if you know what I mean.

OK, so are you playing it on full screen and you get black areas on either side of the game window?
That's what it's suppose to do.

What you see in the middle is your game window.

You need to get a script to change the screen resolution.
There is a window resizer script that you could use.