EDIT, SORRY I posted by accident the post is still under construction.
HI!
Since it seems those HD remaster we are waiting for will never come to fruiction, I was wondering, what we could do to improve even further the games ( appart for making them widescreen :))
First thing that came to my mind is, well a simple HD remaster would feature some kind of improved lighting, and some "modern" tecniques such as Screen Space ambient occlussion or depth of field, someting that happened to Code Veronica HD.
So I first knew about reshade not so long ago, it is a PC tool that allows you to inject some sort of cool post proccesing effects to any game, the thing is it needs acces to the z buffer in order to inject the most advanced effects, such as the before mentioned SSAO and Depth of field, and whenever I read about it everyone would tell me that the Dreamcast does not have a z buffer nor any Dreamcast emulator. so it was impossible.... well... It turns out they were mistaken.
Both Demul and NulldC have z-buffer and Reshade can actually make use of it to inject advanced postprocessing effects.
You will need Reshade (I use Mediator for convenience)
Demul 5.8.2
http://demul.emulation64.com/
or this specific version of NullDC
http://www.shenmuedojo.net/forum/viewtopic.php?f=37&t=46995
And Reshade
https://reshade.me/
So set up everything.
In demul you should select the directx 10 plugin in order to make it work.
In nullDC you should set the z-buffer option to D2468 mode 2 (lower precision) otherwise Reshade will not have access to the z-buffer.
Once you have everything in place just add the emulator to Reshade and tweak anything you want at your will.
The most impressive effect you can actually add to the game is SSAO, you have different options HBO, SGI SSAO etc, it uses the depth buffer to determine objects that are close to each other and makes them project a soft shadow, it gives depth to the game and personally it is pretty impressive,
Basically it does this.
http://i.imgur.com/Ox9krGg.jpg
Some comparissons with the effect turned on and off, notice how closer objects cast soft shadows to each other.
http://i.imgur.com/lY3bk9A.jpg
http://i.imgur.com/CS1jTtY.jpg
http://i.imgur.com/QleNjyi.jpg
http://i.imgur.com/mj6rKRk.jpg
http://i.imgur.com/oY0vjM9.jpg
You can also add Bloom, HDR, Lens flare and so on so lights will look that are actually emiting light.
http://i.imgur.com/t5j19kq.png
http://i.imgur.com/eYiSdqQ.jpg
http://i.imgur.com/XS6DKb2.jpg
http://i.imgur.com/kZRS4ER.jpg
[img]http://i.imgur.com/TTBOIKK.jpg[img]
http://i.imgur.com/bXrSgQF.jpg
http://i.imgur.com/xbIKGR4.jpg
HDR lighting
http://i.imgur.com/DODN68F.png
http://i.imgur.com/sj9ParV.png
http://i.imgur.com/gJEkrWd.jpg
Tonemapping for a more natural looking lighting
http://i.imgur.com/ucd9IcM.png
http://i.imgur.com/qtBZsLa.png
http://i.imgur.com/u9RrCdm.jpg
http://i.imgur.com/csBuuy8.jpg
Depth of field ( once an object gets closer to the camera the background will become blurry, I love this effect too :))
http://i.imgur.com/l5OzfC9.jpg
http://i.imgur.com/BMfuUr2.jpg
http://i.imgur.com/3E74rM5.jpg
http://i.imgur.com/O6VcAoH.jpg
Sorry for the overload of images :D