According to changelog of 5.19, OIT mode is now possible for Libretro-Reicast:
libretro-reicast: reicast libretro and reicast OIT libretro merged into one. ( https://www.libretro.com/index.php/reicast-libretro-and-reicast-oit-libretro-merged-into-one-what-you-need-to-know/ )
So, as described in the link, after choosing libretro reicast, I went to options in retroarch then to Alpha Sorting but only non OIT options appear (per triangle and per strip). The per pixel does not appear. My video card is an Nvidia 750 Ti and I enabled Nvidia proprietary drivers. This video card should support the required OpenGL 4.3. Could someone help me?
Another thing: the libretro reicast has graphics quality (3D) less good than standalone reicast. Are there settings to twerk in order to obtain a better result?
Also, Libretro-reicast offers a dead-zone option which is nice with my gamepad. Is there something equivalent in standalone reicast?
Thanks for your help!