@Rick74
Yeah, that would be pretty sweet 
There should be a ton already floating around from MAME, including some phosphor ones that look pretty decent.
This was a great idea, Rick74. It turns out that you can use any of the 1080p border shaders from the PC port along with integer scaling for stuff like this (all of these screenshots come from a phone):
More borders here: http://filthypants.blogspot.com/2012/09/background-shader-for-retroarch.html
And it’s pretty easy to modify MAME overlays for fancier scanline-y effects, like this one (wrecks gamma, but looks pretty good if you zoom in pretty far):
Here’s the overlay file itself, if anyone wants to try it (could use a bit of tweaking; I cropped it fairly close but it doesn’t line up perfectly with the sides of the game screen):
The borders should scale and work for any phone with an aspect ratio of 16:9. I didn’t notice any performance hit on my HTC One, but if anyone else has performance problems, I’d be interested in hearing about it.
EDIT: One more 
This one is from NeoGaf user richisawesome’s border pack (make sure you turn off the downloader option; it’s laden with adware/spyware, apparently):
http://www.sendspace.com/file/6sljgw
EDIT2: I made a scanline overlay that should line up with pixels properly in landscape orientation (without integer scaling). It doesn’t look great on my phone, but probably looks much better on a larger display, like a tablet: http://www.mediafire.com/download/oniucjj0ddaosdz/scanlines-landscape-noninteger.png
EDIT3: Here’s another one that should line up exactly with NES/SNES games in landscape, integer scale on a 1080p phone/tablet: http://www.mediafire.com/download/qdhxlfx3xcfkgx9/scanlines-landscape-integer-nes-snes.png
I haven’t been too happy with the shader scanlines, so I made an overlay that combines resolution specific scanlines and some tweaked RetroArch buttons. Just place the .png and .cfg files in a folder and point the RGUI there. Change the overlay opacity to about 30%-35%…
I’ve attached 2 different resolutions [1920x1080] and [1920x1200]. Make sure you grab the correct one.
It’ll probably only look correct if your screen resolution matches either 1920x1080 (most new phones) or 1920x1200 (Nexus 7 2013).
If you like scanlines, these look terrific and look to be the correct size, intensity and thickness [IMHO]
Enjoy!
Made some changes in original psx-cfg file for more comfortable playing on iPad. At this moment there is only a new landscape view. Maybe on the weekends I will finish portrait mod, and maybe then I’ll start change the rest of overlays.
Leave comments.
@Boris_T
Great 
Thanks for sharing this. As I mentioned in another thread, we really need some good tablet-size overlays, since the existing overlays are designed for phones. Perhaps once we get a few, we can bundle them with the main program, particularly since it’s just a matter of modifying the cfgs.
Had some problems with my internet, but now it’s ok. So, as I promised here is the full (landscape/portrait) iPad compatible cfg for psx.
Landscape preview:
Portrait preview:
Thanks thats very nice :D!
Oh, you’re welcome. As soon as possible I’ll try to fix other overlays. At this moment I haven’t much time unfortunately.
Can you tell me what game is playing in the Background? Is it Alundra?
It ts a Final Fantasy 9.
These aren’t my own overlays but instead are modified version of current ones therfore all credits go to the original creators.If the sharing of these types of modifications is not allowes,pls delete my reply
Anyway,in the zip file within this link https://www.dropbox.com/s/smxwbu7n2emij0w/overlays.zip?m= are modifed versions of the box psx diagonal overlay and the dual shock overlay
In the box psx diagonal overlay,I simply increased the size because I was getting tired of playing psx games on a very beautiful but puny overlay.(notet that I had set the scaling to 1.13 before modifying the overlay).It is pretty comfy playing on large overlays if ya ask me.
In the dual shock overlay ,I simply added L3 and R3 buttons(note that in the actual overlay,they are mislabeled as duplicate L2 and R2 because I did not have the time to make l3 and r3 images) because apparantly games like Ape Escape needs them
Download from here
https://www.dropbox.com/s/smxwbu7n2emij0w/overlays.zip?m=
any desmume overlay for ios?
[QUOTE=Boris_T;9949]Had some problems with my internet, but now it’s ok. So, as I promised here is the full (landscape/portrait) iPad compatible cfg for psx.
Landscape preview:
Portrait preview:
[/QUOTE]
Your download doesnt seem to contain the png files.
EDIT: Nevermind, I just had to put it in the right place. Nice overlay!
Does anyone have any ipad overlays? or know where to find them?
If you’ve download the overlays from the online updater, just look in the ‘ipad’ subfolder and you’ll find a few that have been modified for the ipad’s aspect ratio.
Some overlays (Adventure, Batman Forever, Battletoads, Battletoads and Double Dragon, Castlevania SOTN)
Castlevania Chronicles.
https://www.mediafire.com/?loyggllh5pw5trw
Doom Troppers.
http://www.mediafire.com/download/un492udi5umukv9/doom_troopers_overlay.rar
altered beast, mk, mk2, umk3, kof98, battletoads arcade.
