Shapeways -
For the past week and a half I've been spending most of my "free" time making up a Polish TOPAS-2AP model for
my Shapeways "shop", along with various related vehicles, and I thought I might post some words about the process. Since I have
no intention of starting collecting a Polish 7th Landing Division force
(touch wood!), these aren't meant for me, so they are really meant for
the gaming community at large. Maybe somebody out there is desperate to field a 7DD force, but is just stymied by the lack of available models in 1:300th scale...
OT-62A as rendered by Shapeways |
WPT-TOPAS in sketchup |
Then I made three Polish versions - a TOPAS, which is simply an
OT-62A with a higher engine intake on the back deck so it's more
difficult to flood in choppy marine conditions, a WPT-TOPAS, which is
essentially a DTP-62 with a large (machine) gun shield over the right
cupola, and finally a TOPAS-2AP as shown in the first picture, and which has a centre-mounted turret mounting a
high-angle 14.5 mm machine gun (again, my model just has a hole
for a length of 0.3 mm diameter wire to be inserted to represent the
actual gun). The software I use to make these models is Google's Sketchup,
because it's freeware. I've never used anything like AutoCAD, just
Sketchup, which I first used before having my house built in Tai Tapu.
Which alas, I have never lived in, because it's in New Zealand, and I am
still in Japan... Note that Sketchup works with polygons - curved surfaces have to
approximated by curved lines (see the gas cylinder heads in the WPT
picture to the left). However, you are free to make a circle be
composed of pretty well much as many segments as you want, so this isn't a practical limitation in terms of modelling a curve (although curves can take a lot of time to get to mesh correctly with the rest of your model). Sketchup was initially written for
architectural-sized designs in mind - occasionally it has problems
connecting things when the dimensions get really really small, and it
also fails to tell you what your dimensions actually are when you get
under 1 mm in size, which can be a serious problem when you work at 1:300th
scale!
Netfabb in operation |
Accordingly, I make up all my models in silico at 1:1 scale, and only
shrink them by a factor of 300 as the antepenultimate step before
converting them into an "stl" file, which is the format the Shapeways
printers require. (The ultimate step before uploading to Shapeways is
checking the stl file for errors in another piece of freeware called
Netfabb, because there will inevitably be some. For example, the model
isn't a single "shell" because there is a plane hidden inside it
somewhere. Or it isn't a closed shell, because there is an opening in
it somewhere. Many of these errors can actually actually automatically fixed by Netfabb, like the ones shown on the left picked out in yellow.)
So if you order a single OT-62 of mine, the amount you will have to
pay Shapeways, in US dollars, not counting the postage, is currently 2
dollars 93 cents, and that's for the very cheapest plastic. Far too
expensive for the average gamer, who is likely to need lots of them...
And if you order, for example, 4 of these in one go, you will be paying
four times that amount. However, if I take my model, multiply it four
times in Sketchup, and connect them with a sprue, to make a single item
of four OT-62s, the amount you pay Shapeways is only $6.89. Barely
twice as much, not four, because you are ordering just "one" item, not
four, so you pay less handling fees. Now seven bucks for four simple
APCs is still not exactly cheap, but it is much more reasonable than 12
dollars! But to get the price down like this means I have to make up
yet another model for such a multiple set on a sprue - both in Sketchup,
and in my "shop", and that will take yet another half an hour of my
time...
What's more, the printer operators often arbitrarily reject models
because they are "too small" - even if they have been printed out
successfully before, which is very frustrating (you will get informed
about this only after your order has been placed, and the rest of the
order has gone through successfully, and I will get informed about it
afterwards too, in which case I will have a fruitless argument
explaining why they they can't read their own guidelines). Of course,
occasionally it actually is my fault, and the model has structural
details that are too delicate for their printing standards to cope with
(or to be more exact; their post-printing handling procedures to cope
with). I'm getting better at avoiding these mistakes, but it's a long
road...
Having said that, 3-d printing is clearly going to come on leaps and bounds in the immediate future. The current print resolutions aren't all that good, at least for the cheap plastics (the more expensive ones at Shapeways cost up to 3 times as much as the prices I have quoted above!), so traditional moulded metal currently has a clear advantage there. But moulded metal is only commercially viable for large enough production runs to justify the cost of the physical sculpting and the mould. OK for bog-standard items, but not for the kind of model we all only need one or two of.
Having said that, 3-d printing is clearly going to come on leaps and bounds in the immediate future. The current print resolutions aren't all that good, at least for the cheap plastics (the more expensive ones at Shapeways cost up to 3 times as much as the prices I have quoted above!), so traditional moulded metal currently has a clear advantage there. But moulded metal is only commercially viable for large enough production runs to justify the cost of the physical sculpting and the mould. OK for bog-standard items, but not for the kind of model we all only need one or two of.
Of course, in the longer term, we won't actually be using
figures anyway. We'll all be using holograms. Think how much the cost
of touch-screens has fallen recently. Soon we will have gaming-table
sized touch-screens in our houses, and they will make great gaming
boards. And since holographic TV is already being prototyped, it's just
a matter of time before we will be virtually pushing our troops across
the table rather than doing it in meat-space...