Huh?

No clue what you're referring to...

3-D Images created by charcoal powder

Its an MP4 video that was sent to me by a friend.

Its entitled "CHARCOAL GUY IS BACK AGAIN - YOU'LL LOVE"

It is charcoal images that these fellows create on a floor surface that look so 3 dimensional.
 

I just don't know how to 'address the video' ??

Completely agree with p51

Hope you enjoyed whatever you were looking at.

3D street art

If you do a Google search for:          3d street art          I think that is likely what Brian is referring to although the street art is in color, not charcoal.

One Spot I would like to have such a

Perspective view of cars waiting at coal mine to be loaded

https://forum.mrhmag.com/post/kit-bashsize-reduction-of-new-river-coal-tipple-12191382

I have several other places that I'd like to have some 3D art backdrop images.

3D Street Art

That's is what I am talking about.

MP4 videos

I just don't understand these videos. In fact I very often just delete any of them that people send me, unless i really think it might be worthwhile waiting for some 'conversion process' to happen to view them.

And now i could not even find a way to post a reference to them. What good are they??

Huh? Revisited

Tried searching the title, nothing came up.

It begs the question; If you don't see why they exist, why did you post about them (and not being to find a way to show us what you're referring to)?

Link

Click here to see the video:

https://www.dropbox.com/s/3iepjmonbh3p0dp/VID-20200402-WA00041.mp4?dl=0

I don't think it is forced perspective in any way a modeler can use, but it is interesting.

David Stewart

Might be ...

Cool on a backdrop or some industrial detail, like a pit in a shop.

This is Amazing art, thanks for sharing. 

Perspective works.... (just gotta control the viewing angle...)

Dear MRHers,

Such perspective tricks, applied to our 3d scale model scenes, can certainly work, on 2 provisios:

1 - They are designed-in to the scene from the outset,
such subterfuge commonly requires a keen eye and control of the entire scene composition to achieve the most-effective result... (adding such things into a scene "after the fact" is far-more challenging, esp if the desire is for a ultra-effective "hiding in plain sight" effect).

2 - The viewing angles need to be tightly controlled. That means that
- full-prosceniums, inc blank-space "wings"
- extreme/oddball display heights,
- both Active and Passive viewblocks,
- and levering viewblocking within-the-scene (scale elements) 
and beyond the layout scene
(layout benchwork interaction, peninsular intrusion/limitations, fascia angles and "leading lines", strategically-variable lighting deployments, etc etc)

are all fair game...
(Although the Passive Viewblocking/control-techniques, where the viewer does not realise that they have been unwittingly manipulated coerced encouraged into viewing the scene from exactly the right height/angle/perspective you needed them to, are usually both the most effective, and the most automatically-accepted-as-"looking right" without-question,

IE all the benefits, none of the impression-spoiling doubt,
unless/until someone actively points-out the trick).

Happy Modelling,
Aim to Improve,
Prof Klyzlr 

PS many modellers already go to significant lengths to do "strategic/subtle/sophisticated" scene composition,
which means they are only moments-away from "levelling up" and additionally integrating such mind-bending perspective-effects...

...and if you can do it in the Visual discipline, then applying same in the Audible modellng realm is only a short additional hop/skip/jump away...

PPS the real shock of the examples in the video are not in the initial pose of the artist,
or even his interactions with the images (the "walking up the stairs" or "balancing on 2 tall columns"),

but the moment when he "breaks character" and moves in a way contrary to the image,
and then obliterates it...

...if you install such a perspective effect on a layout using solid, position-anchored 3d objects, 
it's impossible difficult to do the 3rd-act "reveal" part that breaks the illusion,
(you're not going to repeatedly physicallly distroy the scene every time a single person "spots the gag"),

which is actually a benefit to us as modellers, we get to "do the trick, and walk-away without explanation or further info" (much like the UK street-performer "Dynamo" likes to do...),

which means it is unlikely that the viewer will "spot a Well-Done layout-based perspective trick" in the moment,
but rather it will hit them 5-10-15minutes later, well-after they've walked away from the layout...

"...but, um, hold on a sec, did I just see what I thought I saw??? ...how did they...???"

Forced perspective

  I'm building one scene on my S scale layout with S scale track transitioning to HO scale track crossing an HO scale bridge and river.  I didn't have the space to model the river and bridge in S scale but I wanted to fill in the corner with a track leaving town. The scene is roughed in and seems to work pretty well. Hardest part was laying the track so it tapered from S gauge to HO gauge in about 3 feet. I had to gradually shorten the ties and gradually plane them smaller in cross section. Some photos are in my CCT blog if anyone wants to check it out. I'm thinking about doing a different forced perspective scene in another corner, maybe a distant farm by the backdrop with S scale cows grazing along the right of way fence in the foreground. Different scale cows could be placed the appropiate distance between the track and the reduced scale farm buildings. ...DaveB

Why I Posted

@Lee, I tried posting this because I thought it offered some interesting artistic creation of images we might use on our backdrops. And I figured that someone with more computer knowledge than myself would come forward with a way to link an MP4 video.

I can now see the 'sreet art' example is likely a much better example,...so pardon my ignorance and posting. 

The problem with forced

The problem with forced perspective is that it always looks better to the camera than the eye. My experience is that it needs to be very subtle for the trick not to be perceived by eye.

A person could do something railroad or industry related ...

.. In full scale, film it, and loop it on an otherwise obsolete phone or mini screen built into the (e.g.) floor of said industry.  Playing on John Allen’s “Death of the Diesel Salesman” gag for example.  A roundhouse murder and burial in cement scene.