One problem of emulation is that if you just take a 320x240px screen and make it big, it will look anything from kinda cool (e.g. Super Mario World) to absolutely rubish (e.g. Einhänder).
![Image](https://dl.dropboxusercontent.com/u/3459629/blubb/RetroArch-no-shader.png)
So, how does this new "CRT Royale" shader look? Well... I'd say it looks pretty bad. There's the obvious black borders around all sub-pixels, but also the glow from white pixels looks really bad.
Edit: Have a look at the next posts for some big improvements with the shader.
![Image](https://dl.dropboxusercontent.com/u/3459629/blubb/RetroArch-crt-royale.png)
The next shader I tried was "CRT Hyllian Glow", which looked quite nice after some tweaking. The thing that bugs me is that it looks like someone turned up the sharpness levels on a TV all the way up.
![Image](https://dl.dropboxusercontent.com/u/3459629/blubb/RetroArch-crt-hyllian-glow.png)
In the end I think the simple "CRT Glow" looks the best. It has scanlines and glow and makes the image much more pleasant. Maybe it's a bit too soft though.
![Image](https://dl.dropboxusercontent.com/u/3459629/blubb/RetroArch-crt-glow.png)
The shaders are all available in SVN, so I won't post any download links. For the CRT Glow shader I used the gaussian version and changed the following settings:
Gaussian Width 0.46
Glow Rolloff 4.20
Glow Strength 0.45
Are there any better shaders available for RetroArch?