Nvidia Debunks Conspiracy Theories About Moon Landing
on July 20th 1969 three astronauts flew three days to the
moonwhen they got there two astronauts Neil Armstrong Buzz Aldrin got into the lunar excursion module called the LEM and made their way down to the
moonthe journey took another two and a half hours it was apparently a lot harder than they expected with only 40 seconds worth of fuel Neil lands the lam on the surface of the
MoonMichael Collins orbiting the
moonwaiting for their return shortly after they landed Armstrong left the LEM and makes the first step on the
moonthat step one small step for man one giant step for mankind shortly after Buzz Aldrin makes his way out of the LEM and very carefully without locking the door to hatch because as it turned out they never designed a door handle on the outside makes his way out of the limb and down the stairs what you're looking at here is that seminal photograph that was taken by Neil Armstrong a seminal photograph taken by Neil Armstrong of Buzz Aldrin as they landed on the
moonas they stood as they stepped onto the lunar surface of Tranquility Bay's tranquility base well those photographs came back to earth and of course to this day still takes my breath away thinking about it it was a step for man but surely a giant step for man come but those photographs came back inspired hundreds of millions but at the same time caused many people to be quite excited about whether the origin of this photograph was truly from the
moonthere was good reason for them to...
question these photographs first of all when you look at that image of Buzz Aldrin and you look at the shadows on the ground the dark shadows he's surely in shadow if he's surely in shadow because the Sun is on the other side of the limb how is it possible that he is that bright second we know there is no atmosphere on the
moonand if there's no atmosphere on the
moonwe should be able to see the stars clearly they knew that we could very easily through the positioning of the stars determine whether they were actually on the
moonand the belief is that it must have been too complicated to line those up so they decided to leave them out it is possible that this photograph was taken here on earth now with the invention of VX GI and through the extraordinary efforts of our engineers we meticulously we meticulously model the lunar nun here's the wonderful thing about the lunar LEM it's made out of aluminum aluminum foil cloth and a generous application of tape it was a flying coke can no wonder Aldrin and Armstrong wanted to get out of that thing as fast as they could was a flying cocaine we modeled every detail we had to model every single detail we modelled them surface of the
Moonso that we could start to study and test these mysteries and come to our own conclusion through scientific means whether it is possible whether they did land on the
moonladies and gentlemen I'd like to demonstrate to you guys now our work single little detail now first of all...
come on fess up you thought that was a photograph right that was a photograph you thought you thought that was a photograph the first time I saw it well first time I saw it it was rough but by the time I saw the final works I thought it was a photograph it was really it's really really amazing work the engineers modeled every little detail and so let's go through and let's think about let's test each one of those
theoriesthe first one is this Kurtis let's go to let's let's assume that he is in shadow and that they're the only light source is direct well this is what it would look like this is what buzz would and this is what people expected him to look like and the reason for that is because the Sun is on the other side of the Lamb and you can also see the shadows on the ground are perfectly dark so how is it possible that he's lit was it turns out we modelled the entire surface of the
moonwe modelled the dust particles of the
moonand we learned this we learned that the dust particles on the
moonwhich is created obviously from asteroids my barding to
moonokay relentless over billions of years it's fine particles and in fact has reflective properties now the reflective properties are not great it only reflects about 10-12 percent of the light that hits it however as a mini type of dust particles and crystals when a light hits it directly and you look at it from the same angle as the light source the reflected light is...
multiple times brighter than it otherwise would have reflected it's a phenomenon called opposition surge well we simulated the properties of the
moondust and as you can see right now the Sun is behind me the lamb is beside me notice the brightness of the Sun as is electing off the lunar surface well suppose we were to turn on VX GI and we turn every single surface into a light source so that it reflects the light let's see what happens well voila reflecting off of this lunar surface reflecting off of the lunar surface the Sun was able to light Buzz Aldrin well that's mystery number one mystery number two is this why is it that while we're looking at him right now we don't see the stars well that's a simple answer turns out it's a simple matter of exposure the light is so bright in fact the light is so bright in fact that they had to change the exposure to their camera to the point where you're not over blindingly bright on the surface of the
Moonwhile therefore you're no longer able to see the Stars and so what we did was this in fact when we look out into into the sky we've modeled all 84,000 of the closest stars around Earth that we can see from Earth and if we were to change our exposure this is what we would see not Curtis what would happen now if we were to look back down now this is what they would have seen if they were to were to adjust their pupil and got accustomed to seeing the stars and then look back down everything would...
be so white so bright because of the sun's brightness reflecting off the surface of the
moonnow let's change the exposure again please look how beautiful that is huh hey guys what do you think real-time computer graphics with real-time global illumination well there's another
conspiracythis particular question was kind of interesting well it turns out can we go to the slide please when you look at this other iconic image of buzz stepping on the
moonit's taken from a camera that plops down from the lamb and a captured Neil Armstrong coming off the ladder and a captured Buzz Aldrin coming off the ladder the theory that this this photograph was in fact taken on earth was because they believed some believed that that light source that really bright light source beyond buzz was in fact a light that they forgot or somehow mistakenly did not take out of the way when they took this picture and so a word go back to our simulation in fact if you were to look at that well shucks that's an interesting question that's an interesting question until if you were to figure out where Neil Armstrong was standing where Neil Armstrong was standing when he took the other iconic photograph you'll discover that lo and behold there's a white object there well here's the amazing thing Neil Armstrong's spacesuit is made out of largely Teflon a material called beta material beta cloth and it has a reflectivity of about 90% all the light that is that hits Neil...
Armstrong 90% of it bounces off me you could just imagine how bright the Sun is without being disrupted by the atmosphere it lights up Neil Armstrong and it helped us solve one last unexplained issue when we were working on this project the one last thing we could never figure out is why is it that when we compared and now we've simulated everything to death we simulate the brightness of the Sun we simulate the reflectivity and the material of the lunar surface we've captured all of the geometry we've put all the right materials into the lunar lander and a lunar lander is reflecting off and also projecting its light on Buzz we've modeled every little detail now why is it that when we look at it Buzz still seem too dark well it wasn't until we modeled Neil Armstrong and we put him in the scene that we were able to see the difference how about let's to turn Neil on and off off on off on that little tiny detail and we'll show you in just a second it's so compelling that we now understand why it is that Buzz was lit the way he was well let's take a look at let's step out and take a look at Neil and what he looks at looks like there's Neil yeah isn't that beautiful the extraordinary detail that the engineers put into it is just really really wonderful to see and then lastly let's compare the before and after if you can go to slides if you're not sure the right side is the photograph the left side is the simulation what do you...
guys think in the example of the Cornell box I used essentially a photograph to test real-time computer graphics and we continue to improve its capabilities we added VH GI and as a result of that real-time computer graphics came awfully close to the image that was generated by eye rain now that we have the xgi we use the technology the engineers use the technology to test against a controversial iconic seminal photograph that was taken in the 60s