Back To The Future 2 Hoverboard

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Most of the threads on this are very old so I'm starting a new one.

I saw a lot of comments that the decals were more of a problem than the construction, and with 3D printers getting better and better, it seemed to me there was scope to revisit this.

I'm not a professional or even much of an amateur prop builder...but I am a bit OCD. I look at the models from the movie and those that are available today, and get this itch behind my eyeballs. The multiple models used in filming are part of that; I get that they needed slightly different construction, but even back then continuity could have been better. Some boards have velcro, some clearly have fabric tape. I swear in one shot the much-vaunted ,"lenticular" appears to be nothing more than pink bubble wrap, and don't get me started on the Mattel-logo-that-isn't - and that's in the movie!

So I'm asking a question; would people prefer a movie-accurate hoverboard prop...or what the movies would call a "reboot"? Same basic layout, but built to look more like one might expect a hoverboard to appear...which might include the odd flashing light?

I'm already producing the "movie faithful" version for a friend's wedding, and as part of that I'll be putting up some files at some point. There will be a charge, but this will be more than the average download...multiple STL files allowing different construction options, lists of currently available materials and for the first time (I think) decal files in svg format that are grouped by material, so you can print (for example) all the white pieces from a single sheet, and apply them yourself to be as cost-efficient as possible...as well as supporting the further minimising of materials by using a version of the bottom decal that has a cutout so you're not sticking expensive vinyl down only to cover it up.

But, since it's simpler to decorate without that cutout, also a version that supports that too.

I'll be providing numbered drawings to show which decal goes where.

And for those of us who do NOT have the huge 350x350x350mm print volume of the Creality K2 plus, two versions, one with the board in three pieces instead of two.

So yeah, grand designs, but, full disclosure, I may be biting off more than I can chew because of my Parkinson's disease. So far, I have version one of the physical board (image) confirming to the original 200mm width, 710mm length board with 75mm of that length being the kicked-up "tail" at a fifteen degrees angle. For most of the decoration I'm using tape, not vinyl, so some *ahem* adjustments *ahem* have been made to allow for 50mm (2") standard tape widths. But it annoys me every time I look at it, so at some point I'll try and get a more accurate "vinyl solution" uploaded as well.

So...that's the plan. Only time will tell if I can actually deliver.
 

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This is a great choice for a prop to apply 3d printing to... There's a ton of information and references out there to confirm size, proportions, and other details, and definitely a lot of people who are very familiar with this prop on the RPF and can likely help.

From my own experience, people do prefer a screen-accurate board, but I say build what suits you; there are a few projects I've seen here that were 'non-canon' to a movie and still had a good following. Also, getting the correct materials (like the Marty board lenticular) might be a deciding factor for you want to go original; I've never done Marty's board just because my OCD would require to have the correct lenticular :lol:

Anyways, good luck on your project, looking forward to seeing it come together!
 
That lenticular is the bane of my life. Would you believe some eight years ago I had loads of lenticular sheets from other projects.

Threw them out last month, thinking I'd never use them. D'oh!

And by coincidence, ended up talking with the company who produced lenticular photos for the original movie - the ones where Marty "fades out of existence".

Right now, I have a "low rent" version that is;

1. Not as good in terms of 3D effect
2. A pain to produce (it's two stages, layering vinyl onto vinyl...sure, nothing can go wrong there, can it?)
3. Still quite expensive at £1 for each A4 sheet of "stage one" and £17 for 2m x 76cm of "stage two"
4. Still technically a pipedream since stage two hasn't been delivered yet...

Very hard to see what the lenticular actually DOES in 2D stills, and there's nothing in the movie where Marty rolls the board in the sunlight to see how cool it is. If anyone can spare me a few square centimetres of it I'd be delighted; I'm new here, so I hope it's the "share what works" kind of forum, not the "protect my secret method at all costs" kind!

To which end (and I know it's not a true lenticular, but there comes a point where as you say, you either accept the change or your (my) OCD means you never do it. Here is my suggested "it's not right but it's close" option...

This;

Overlaid with this;

As I said, as yet untried. My idea is to apply the window film to the holographic film, then strip the holograph's backing off and apply it to the model. I did think of putting the holograph on the model first, but even with my super accurate 3D printer, that gives the possibility of air bubbles due to surface inconsistencies and the pink window film is SUPER thin...I mean maybe ten times thinner than the thinnest vinyl you ever saw.

I'll be using a spray mister with a dash of dish soap and my best squeegee (when I can FIND it, but that's another issue *edit - found it! Yay!*) to make it as easy as possible to chase out air bubbles; but that means the holographic vinyls backing paper might curl or distort in response to the moisture, and I want to cut it out on my cutter so....argh! Every solution brings a new problem!

*sigh* how prophetic that last line turned out to be. The holographic sheet, for no reason I can understand, has a surface coating that is not water resistant...so as soon as I spray it with the water/dish soap mix, it turns white and softens. In this state I can remove it, but it's just another step in what is already a time consuming process.

But, that done, and overlaid with the window film (red, because my pink one hasn't arrived yet), it does give a pleasing 3d effect.
 

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PS a measure of the OCD; I've actually designed a 3d sheet, 1mm deep with 0.8mm spherical indentations that I was going to print in clear pink PETG if all else failed!
 
Parts I've printed so far...They're all unpainted Elegoo PLA, except for the magnets which are Geeetech silk silver PLA.

Particularly pleased with my board joiner joint; a long, tapered tenon. I'll have to shuffle things around a bit to make this more accessible to people with smaller printers.
 

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What machine are you running? The finish on that silver PLA looks especially nice!
Yeah I treated myself a few months ago to a Creality K2 plus. It is awesome when it plays the game, and a true "enfant terrible" when it's not.


However within that, the silk silver from Geeetech is a fairly special filament in my experience, far shinier than other so-called "silks" or "metallics".
 
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That lenticular is the bane of my life. Would you believe some eight years ago I had loads of lenticular sheets from other projects.

Threw them out last month, thinking I'd never use them. D'oh!

And by coincidence, ended up talking with the company who produced lenticular photos for the original movie - the ones where Marty "fades out of existence".

Right now, I have a "low rent" version that is;

1. Not as good in terms of 3D effect
2. A pain to produce (it's two stages, layering vinyl onto vinyl...sure, nothing can go wrong there, can it?)
3. Still quite expensive at £1 for each A4 sheet of "stage one" and £17 for 2m x 76cm of "stage two"
4. Still technically a pipedream since stage two hasn't been delivered yet...

Very hard to see what the lenticular actually DOES in 2D stills, and there's nothing in the movie where Marty rolls the board in the sunlight to see how cool it is. If anyone can spare me a few square centimetres of it I'd be delighted; I'm new here, so I hope it's the "share what works" kind of forum, not the "protect my secret method at all costs" kind!

To which end (and I know it's not a true lenticular, but there comes a point where as you say, you either accept the change or your (my) OCD means you never do it. Here is my suggested "it's not right but it's close" option...

This;

Overlaid with this;

As I said, as yet untried. My idea is to apply the window film to the holographic film, then strip the holograph's backing off and apply it to the model. I did think of putting the holograph on the model first, but even with my super accurate 3D printer, that gives the possibility of air bubbles due to surface inconsistencies and the pink window film is SUPER thin...I mean maybe ten times thinner than the thinnest vinyl you ever saw.

I'll be using a spray mister with a dash of dish soap and my best squeegee (when I can FIND it, but that's another issue *edit - found it! Yay!*) to make it as easy as possible to chase out air bubbles; but that means the holographic vinyls backing paper might curl or distort in response to the moisture, and I want to cut it out on my cutter so....argh! Every solution brings a new problem!

*sigh* how prophetic that last line turned out to be. The holographic sheet, for no reason I can understand, has a surface coating that is not water resistant...so as soon as I spray it with the water/dish soap mix, it turns white and softens. In this state I can remove it, but it's just another step in what is already a time consuming process.

But, that done, and overlaid with the window film (red, because my pink one hasn't arrived yet), it does give a pleasing 3d effect.
I don’t know if you saw my lenticular references on that other thread, but it’s not super expensive to get the real thing.

Original product:

Same stuff, different company:
 
Both in the USA though, so delivery is crippling...I cancelled an order for three rolls of coloured fabric tape (can't get certain sizes over here) because delivery was more than double the order value!
 
Both in the USA though, so delivery is crippling...I cancelled an order for three rolls of coloured fabric tape (can't get certain sizes over here) because delivery was more than double the order value!
Ah yes. Are you in the UK? This company carries the products, but they’re currently sold out. I don’t see the clear, only red and green. Could call and ask…

 
Ah yes. Are you in the UK? This company carries the products, but they’re currently sold out. I don’t see the clear, only red and green. Could call and ask…

I'm going to resort to printing my own ,3D one tomorrow...I'll let you know how it goes...
 
Now printing - board in three parts...twelve and a half hour print, 540g of filament - so as usual with big prints it's not the filament that's the cost (about £7.50, as a full 1kg roll was under £15) it's the time...and the worry of whether it's going to throw a shoe or not...!

1751889760283.png
 
Ah yes. Are you in the UK? This company carries the products, but they’re currently sold out. I don’t see the clear, only red and green. Could call and ask…

Just had this back from the UK lenticular supplier;

Hi.

Thank you for your enquiry. This product is no longer being sold in the UK and we cannot find another supplier for the illusion film currently L Sorry.

Kind regards
Paula
SFXC
 
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