I played the Sunset sierra mission recently. Managed to destroy all of the Msta artillery and most of the surrounding air defence. As I was coming in for a gun run on a Shilka I took some hits but was able to limp home and land safely.
Upon playing the replay I was suprised when observing the same encounter,the Shilka actually shot me down and I obviously died.
It was on version 1.1.1.1 by the way. I was aware the patch to 1.1.1.1 addressed some replay issues, but this replay at this particular point was so incorrect I was really suprised.

Has anyone else experienced this?


Allizdog

It's a known issue and that last time I heard anything about it is that ED was looking into it but it wasn't the highest priority.

Sounds like an M. Night Shyamalan mission. "I see dead Hawgs!".

AFAIK, the ED track playback system consists of setting up the simulation with a defined set of starting conditions and then starting the simulation with the user control/keyboard inputs played back. In theory, if the simulation is 100% repeatable, you should get the exact same performance. In reality, there are numerous factors that result in the simulation results being slighty different from real-time play and playback (just guessing, but things like frame overruns, randnom number draws, exception handling, etc.). Once one function returns even a slightly different result the rest of the simulation playback can rapidly diverge from what was originally occurring. And that's with a sim that's exactly the same configuration: install/remove a mod here or there or play a track from a different version of the sim playback gets broken very quickly. The current method is just not robust for even minor differences in sim execution.

I love the IL2-1946 playback system that uses the .ntrk files, as it actually stores aircraft positions and velocities, ensuring a more accurate playback across machines and across versions and (most) mods. I know I would love to have something like that in DCS World.

i ran a mission a week ago, took out tanks with my Mavericks and LGBs,

took some hits, landed with no gear (skid landing),

Watched the saved replay, apparently I lowered my gear and dove into the ground before I even encounted the tanks that I got credit for killing, its like the Replay TRACK stopped recording inputs and coordinates and the system just floats the plane into the ground.

As said, it is a long standing problem. Changing views or altering time rate will also cause errors on even a short and simple track. ROF seems to have recording and playback functioning quite well also.

It's systemic of the "recorded instructions" vs "recorded results" method of replay storage. The first is very efficient with file size the latter is the most accurate or error tolerant. With timing or floating point errors the ED method just isn't reliable.

TacView is a robust recorder but has limited information stored. For the overall tactical situation it's often superior.