SCU interrupts were corrected.
Myst, Burning Rangers and Shin Megami Tensei Devil Summoner now work.
The graphics of MeltyLancer ~Ginga Shoujo Keisatsu 2086~ are now correct.
Transparency effects of the VDP2 were corrected.
Mahou Gakuen Lunar!'s graphics are displayed correctly.
Sprite processing of the VDP1 was corrected.
The water in Akumajou Dracula X is now fixed.
That author also mentions that interrupts might lock up the emu sometimes (or something like that), and to reduce the number of SH2 commands to fix that till its corrected.
it's not possible to accurately reproduce the Sega Saturn in Direct3d and thus the slower but lot more accurate software rendering is used, the author mentions that on the main page (at the bottom).
The Saturn used forward-rendered quads, while Direct3d uses polygons, they work entirely different.
Personally, I think it's a lot better that it uses software rendering, even if its slow. The image is reproduced 1:1 this way, even up to the level of interlaced drawing (!!!) which is something that I haven't seen in too many emulators. Are there any psx or n64 emus that work the same way, by the way?