QEMU 3Dfx Glide Pass-Through (HAXM/WHPX/KVM works!!!)

[robertmo]

https://www.vogons.org/viewtopic.php?f=24&t=60950
Pyl is finally playable.
Pyl English translation:
https://www.vogons.org/viewtopic.php?f=24&t=32340

[Zeus]

Pyl is finally playable.

Nope. Disabling access to depth buffer can give you couple fps but it makes the game to render incorrectly. Light sources, special effects and enemies visiblity all rely on it.

[robertmo]

Just in case I post my test results I did some time ago.
https://www.vogons.org/viewtopic.php?f= ... yl#p737523

[Zeus]

qemu haxm
LfbNoAux,0
55fps

Does this mode provide unlimited access to aux (depth) i.e. light sources and other effects render properly?

[robertmo]

at least fire seen through closed door, so I guess not correctly

[Zeus]

It would have been better IMO if left at 40 fps without sacrificing accuracy (virtualization is already a nice performance boost).

The current state isn't good for playability (Pył heavy relies on lights) and preservation. Performance results cannot be compared with DOSBox atm as only the latter can provide proper aux input to Glide wrappers and as a result accurate final output.

Pył is not the only title that use aux for rendering. There's also Extreme Assault, Motorhead, Tiger Woods PGA Tour, P.O.D., Requiem: Avenging Angel, Monaco GP 2, F1: Racing Simulation, Severance: Blade of Darkness and couple more.

My suggestion to kjliew would be to leave "LfbNoAux=0" unoptimized or to check optimizations against every Glide title that utilize auxillary buffer, to be sure they don't have any negative impact on rendering accuracy.