[roeter]

markus_GE, on 22 May 2014 - 01:38 PM, said:

Then I must have misinterpreted the position info. Any comments by somebody else on that?

Position is X - Y - Z :
X is perpendicular to engine front - rear axis (that is sideways value)
Y is height
Z is along engine front - rear axis (that is front - rear value)

So in this example :

Exhaust1 (
0 4.77 0.819
0 1 0
0.17

Exhaust2 (
0 4.77 3.269
0 1 0
0.17

Both exhausts are at the front to rear centreline of the engine, at 4.77 m above rail level, one at 0.819 m from the centre, the other at 3.269 from the centre of the engine (both toward the front - but I'm not entirely sure about that).

Regards,
Rob Roeterdink

[markus_GE]

:sign_welcome:, Rob. Obviously, standard coordinate axis directions, as I learned them in the Geometry classes don´t apply here.

Anyway, the possibility the two exhausts might just overlay one another has been proven wrong now.

Right, Ziggy, the MaxRPMCHangeRate might also play into this. Depending on whom the engine was built by (EMD, GE, ALCo, etc.) the values there should vary between 20 and 40, higher for two stroke engines, lower for four stroke ones.

Cheers, Markus

[markus_GE]

That looks alright for an older EMD... I´m really dazzled with the information and descriptions you provide. Maybe it really is a bug? Any other opinions (ORTS devs?) on this?

Cheers, Markus

[markus_GE]

My internet connection has been playing hide and seek with me for a few days. It still is too slow to watch the video in a quality good enough to decipher the HUD, but it looks like your problem is totally about FPS. If I can see right, these are single digits!

Could you please give some further info on that?

Cheers, Markus

[James Ross]

It is entirely possible that the low FPS (about 7 I think) is contributing, so I would recommend adjusting the viewing distance and detail level to get a better FPS if you can and seeing if that makes any difference. It is possible, for example, that the physics is (effectively) adjusting the exhaust volume faster than 7 FPS and so is producing unusually big clumps. Also, the partial engine does not cope well with emitting multiple particles per frame particularly when they're fast moving, which could also be contributing.

[markus_GE]

What would you define as "mid FPS"? I at times also get puffy smoke in FPS starting from and below the low twenties to high teens.

Cheers, Markus

[markus_GE]

That´s rather odd than and way beyond what I have been experiencing and experimenting with... Really, :sign_thanks: to say I have no further idea.

Cheers, Markus

[James Ross]

To be perfectly honest, that looks like simply a very low emission rate (either a large hole or small volume from the physics).

[cr-stagg]

Well DUH. Why not look in the MSTS Technical Documents?

SteamMaxSmokeUnitsReleaseRate (Steam locomotives only). The maximum number of smoke units that will be released at once.
The maximum release rate per second. 3 1 to 8 Positive number. Engine

[markus_GE]

That would be done by altering the value of DieselSmokeEffectInitialSmokeRate and DieselSmokeEffectMaxSmokeRate (these might contain typos in this post, however).

Cheers, Markus