[Genma Saotome]

I stumbled upon the page up key while in the MSTS route editor and (re)discovered it extends the view distance well beyond 2000m.

Here are a couple of screenshots you might find useful should you choose to fiddle w/ the way OR does fog at the viewing limits.







I thought it interesting that the face of the fog, as seen straight on by the camera was not flat and that it was repeated about every 700m. Can't quite tell what's going on in the hills but it does look like the fog doesn't go up very high.

Anyway, all these years w/ RE and I'd never seen the fog like this... thought it was interesting.

[B & O GUY]

Dave

Unless I'm missing the point here. Fog does tend to be low hanging and lies in the valley's while the hill tops would and could stick up over it and be clear from fog. Fog also tends to be over rivers and streams at it's heaviest in the spring and summer month's. And I'm talking about here in the east. I don't know about western terrain. Also here in winter when we have a warm up followed by a quick change to cold weather fog will hang over heavy snow area's. I've included a shot from Flight Simulator showing the hill tops sticking up through the fog.



I know this isn't a Flight Simulator thread but am just trying to show what fog is and how it appears.

Allen :spiteful:

[Genma Saotome]

Thanks Allen, I appreciate the thought... but living not far from San Francisco I do have some experience of fog :spiteful: . What I thought was interesting was that the MSTS fog has a shape... it's not just one plane of painted pixels (as I always had thought) but multiple planes projecting towards the camera. I dunno what OR does.

[B & O GUY]

Yeah! Looks like it was cut with pinking shears too. Maybe when your in it, it's not so pronounced.

Allen :spiteful:

[James Ross]

Genma Saotome, on 22 January 2011 - 07:33 PM, said:

I dunno what OR does.

From 0.5*view distance to 1.0*view distance, the individual pixels are faded to the fog colour. There's no "physical" object to the fog, just everything drawn far enough away is drawn faded.

I should note the MSTS and OR fog in this thread is not the typical real-world fog, it's a "distance fog" to hide things as they get further away (this happens in the real world too but I'm not sure what the effect is called).

[spud]

I believe its called air pollution!
:sign_sorry:

[James Ross]

spud, on 23 January 2011 - 08:49 AM, said:

I believe its called air pollution!

Haha, too true. The effect I was after is apparently called Rayleigh scattering, and air pollution simply exacerbates it. :sign_sorry: (One day I'll get stuck on Wikipedia and never leave.)

[captain_bazza]

Quote

(this happens in the real world too but I'm not sure what the effect is called)

In some war based sims it is refered to as The Fog of War, meaning there is no knowledge of what is happening in the areas fogged out.

Cheers Bazza

[B & O GUY]

One thing they call it on the GREEN site is SMOG. Found this image this afternoon and the photo is named appropriately.



Allen :sign_sorry: