#11
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With the prevalence of so many scale models of popular vehicles on the market, especially ones loudly touted as "accurate" and "authentic" on the label, and the increasing availability of 3D digitizing equipment & cad, it seems likely that the two will come together to provide such electronic buck files at bargain prices.
The problems involved with enlargement of model and proofing them are significant. Accurately scaling up a smaller scale model is best done in small steps, with each enlargement properly corrected before the next enlargement. Dimensional Information is lost when the shape is reduced in size and is added when the shape is enlarged in size. Simply put- if given two points, at least one point will be added between them as they move apart when enlarged. Repeat, repeat, repeat until done. Assuming or guessing is bad technique. Enlarging more than 2x per step can be done, but is risky and inaccurate. Just like many original coachbuilt cars vary in symmetry from left to right, great looking small models regularly have significant problems. It's not uncommon in my sculpture work to spend many billable hours, if not days, measuring a small scale model with compasses to then correct it before proceeding. Even with digital scanning and 3D milling, the foundry I use will typically enlarge a brilliant-sculptor-friend's work no more than approx 2x at a time. To produce an 8 foot final statue from an approved 1' tall initial model into an 8' tall finished statue will take 3-4 steps. 1', 2', 4', sometimes 6', 8'. At each step, the job will be completely modeled again in clay over milled foam core to add information and correct discrepancies, then scanned again for the next round of the same process. For the best & most accurate work, there are no shortcuts. Those station buck e-files are even more seductive. If you want to build a Cobra 550 Spyder, you already see the result in your mind and justify the goal/job with the proposed buck/model. Lots of shape information isn't there. But all you see is a shiny metal finished body because that's what you seek.... Don't make assumptions. When you know the scale of the original model or source vs the job, you'll have a better idea of the value of the item/file/buck at hand. A full size, 1:1 (model:job) ratio is always the most accurate model to use.
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AC Button II http://CarolinaSculptureStudio.com https://www.youtube.com/channel/UCzSYaYdis55gE-vqifzjA6A Carolina Sculpture Studio Channel |
#12
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Yes, if a toy model is used for scanning, everything is different. In college, design teaches that if, for example, the real thing shrinks, it must be done in proportion and adjusted. This means that a sharp reduction or enlargement does not work. If you just shrink the thing, it looks bad. It needs to be fine-tuned.
But it's tempting with today's technology.
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Jaroslav |
#13
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bucks
I have spent a lot of time and some money building a buck for my 166MM project and have a couple conclusions:
Using scan data AND learning to manipulate it is WAY too expensive and involved. Requiring multiple iterations to get even close to right Accurately reproducing any early (pre 80s) hand built car is a fools errand. They weren't building duplicates. They were building sculpture. Sitting in front of a computer is boring. Metal working is enjoyable! My advice, not that anybody cares, is to buy a bunch of aluminum and wire and form what looks good to you. Aluminum has good scrap value.
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Tim Freeman |
#14
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Yes, when it comes to free fantasy creation, you can create any monster you like. If this car is well known and there are comparable originals, you have a problem. Unnecessary work and smiles.
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Jaroslav |
#15
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I ran across the Russian guy Kitcarik.ru again and asked him if he scanned real cars or based his bucks off scaled up models. His reply:
Quote:
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Kerry Pinkerton |
#16
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The various Forza models have been on the web for years. The protection was cracked and the models have made their way into other Racing Simulations like GTR2, rFactor, Assetto Corsa, etc. by people who mod (modify) those games. Legal? No. But according to what I have read, some of the Forza models were based off real scans.
https://www.cnet.com/roadshow/news/j...ed-into-forza/ https://www.google.com/search?client...4dUDCAs&uact=5
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Chris (trying to be the best me I can be) |
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