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Comment Re:Is this really a problem? (Score 2) 193

I'm not entirely convinced "economy of scale" even applies much to Lithium Ion batteries. Their cost these days is largely related to mining and processing the materials that go into them.

Two things. One is that things are always cheaper the more you buy. So those mined materials come cheaper if you have a big manufacturing facility.

Second is that actually most of the raw materials for the batteries will come from recycling old batteries. At the moment Tesla only does a minimal reprocessing themselves, then send old batteries off to 3rd parties to recycle. And those materials don;t come back.

The new factory will recycle as much as possible of the batteries into new batteries. Of the order of 90%.

Comment Re:volume (Score 2) 193

How are they going to make them cheaper?

Economy of scale and efficient recycling of old batteries.

If there was a way of doing so, wouldn't somebody be doing it already?

The incentives for battery companies and an EV company are different. A battery company is quite happy if the market price of a battery remains high. An EV company wants it as low as possible.

Seems to me there are many people out there who think Elan Musk is some combination of Midas & Canute.

Seems to me that as soon as a successful tech entrepreneur starts to become a household name, there's a irrational wave of vitriol and spite comes across a minority of Slashdot posters.

Comment Re:Hybrids (Score 2) 193

In five years or so, when the owners of the first generation of hybrids face that battery upgrade, they might start selling quite cheaply.

Huh? The first generation of hybrids were the original Priuses, which are 17 years old. And user reports are that many of them are still running on original batteries. Replacement if needed is of the order of $2000.

Comment Re:resell value already bad (Score 1) 193

even before the end of the battery life the battery would give diminished returns and it would hurt the resell value more then non electric cars.

ICE cars also give diminished returns over the years. Those MPG figures quoted for cars only apply to new cars. As engines, gearboxes and wheel bearings wear, so the efficiency falls, and you get less MPG.

If you keep the car long enough, you'll have to have the IC engine switched or reconditioned.

Of course with an EV, when the time does come to replace the batteries you'll probably get a new set that's even better than the original, with a greater range. Because the technology will have improved in the intervening years.

Comment Re:2 1/2 D (Score 1) 127

Note a depth mapping technique for each pixel isn't Doom-style restrictions unless the camera is in an unusual orientation.

It's just an analogy. One that illustrates that depth mapping doesn't give proper 3D.

What you -can't- know about are objects behind other objects from the camera's standpoint, or stuff behind the camera. This is mostly OK for faking depth of field.

Absolutely. But it's not still not 3D, it's 2.5D. No one said 2.5D wouldn't work for this application.

Comment Re:2 1/2 D (Score 1) 127

If you have a depth channel you could displace a 3D plane in camera space and render that in 3D.

No, you'd only have the surfaces that are first hit with raytracing from the eye. That's not 3D. That's why it's 2.5D.

The real problem isn't 2.5D/3D it's the fact that there is no parallax information for occluded information.

But that's exactly the problem that 2.5D brings. You don't know what's behind foreground objects.

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