Archive for the ‘Technology’ Category

Setup V-Ray Render Farm The Easy Way

This can become frustrating sometimes to keep looking at your screen and trying to determine the position of each and every pixel. This can be frustrating for many people, especially lazy ones, like me. In this situation we have an option to build our own Render Farm and make our lives easier for long term.

The biggest advantage of building your own render farm is that it is quite cheap and quick process and one doesn’t really need much technical expertise to achieve that. Though, you need to have fast processing system in order to build your own V-Ray Render Farm, due to its high specification requirements. In this article we are going to discuss exactly how you can build your own Render Farm, but before getting into the details of that, we would like to explain what V-Ray actually is?

V-Ray an is application that comprises of various Render Farms. It is very easy to use this application and its handful of features, including the option of working in Network Rendering.

In order to build your own Render Farm, you would need the following:

  • First of all, of course, you will need to install V-Ray software in your PC. Keep in mind, V-Ray is not a standalone application; it works along with other 3D software, including Maya and MAX.
  • Fast Processor: You PC will be required to have a fast Processor so that rendering doesnt take days to complete, also if your PC has slow processing speed, your PC might get halted when you try to render a large file.
  • You will be required to be connected to a local network with multiple PC’s. All the PC’s must be connected to each other and be a part of the network. Also there shouldn`t be any firewalls blocking the connection.
  • Fast Connection: Just being connected to other PC’s is not enough you will be required to have fast internet connection to ensure that data is transferred in least possible time, which will prevent a lot of time from getting wasted.

When you have all the above mentioned things setup, you can move towards building your very first Render Farm. Firstly, you will need to setup the V-Ray Render Server. This Render server is setup on any of the slave machine, through Launch V-Ray DR Spawner application, which is present in the install folder of V-Ray. The path to the install folder can vary depending on the 3D Software you are using V-Ray with. Another important thing to keep in mind is that you must get administrative privilege before starting the setup process in Windows Vista & 7.

Next you will need to setup the parameters for your installation. This is done in the Master Machine, which should have the maximum processing speed and RAM. Here you should run the Render Setup process, which will launch your setup. You will need to set V-Ray as your Default Production Render Application, and then move towards the Setting Tab, and put the check on the Distributed Rendering box.

After that you will have your V-Ray Render Farm ready to be used for rendering 3D images and animations. 

About Author
Mike is a freelance writer who loves to write amazing articles on technology and gadgets, he is also an expert in 3d designing and loves the render farm lightwave technology.

Focus Breathing With Some Nikon Telephotos

Nikon’s series of 70-200mm lenses are fun, sturdy devices, with an extremely crisp telephoto range, all the way down into portrait territory. Making an optic that spans such a range is no easy task; compromises have to be made if one device is to accomplish so much. Out of this fact comes an adverse effect known as focus breathing, which means that a lens’ focal length has a dependence on the distance from its subject. In other words, the closer you get to an object, the shorter the effective focal length of the lens becomes.

Its Affect on Us

To be explicit, here’s how focus breathing works. Let’s go out for the day to a rolling park, where we find ourselves in the middle of a large field, under a gazebo with plenty to stare at. You set everything up on your tripod and decide that today is a day to use your 70-200mm f/2.8. As you start taking some pictures of the tree-line in the distance, there are no problems. But suppose you now pointed your camera towards a bench in the gazebo, still set to your 200mm focal length. Now that we’re using our telephoto range in close proximity, the effective focal length of the lens has decreased. Moving your tripod closer to the bench will amplify this effect, and it is the result of long focal lengths not really being meant for short range use.

A Comment on the Severity

On the f/2.8 specifically, focus breathing is such an issue that at a distance of 3 feet, the focal length is about 60% of its nominal value, a huge difference! The easy remedy for this though is that wider focal lengths do not exhibit this same problem. Obviously, it makes no sense to have close up shots of the gazebo’s construction without making full use of the lens’ focal range. The existence of this on a lens, even excessively so, isn’t much to worry about as it can be worked around. Those looking for peace of mind, however, will be happy to know that Nikon’s new 70-200mm f/4 ED VR AF-S exhibits almost no breathing.

Something to keep in mind about focus breathing is that it is not as enormous of an issue as it seems in the abstract. In all practicality, if you own a 200mm telephoto lens, then you will want to use it for distance photography. Having the ability to swap between that and the normal 70mm range means great versatility, and the good news is that most lenses only breathe at the long end of their spectrum. The wide end does not exhibit nearly as much of this effect, and likewise, the wide end is what you would opt to use for closer subjects anyhow. It isn’t a deal-breaker in any case, merely something to be aware of.

Attached Images:

Bill Green is an engineering student and freelancer for Photo.net where you can read an in-depth review of the Nikon 70-200 lens and hundreds of camera and lens reviews.

Augmented Reality Kiosks: Futuristic Marketing

The arrival of Google’s new Glasses project has brought the whole idea of augmented reality right back to the centre of the fold. Augmented reality has, for a long time now, been touted as the future of interaction and been introduced in varying guises.

From apps such as Layar for smart phones to other manners in which to implement it, there are few places where augmented reality (AR) has been as interesting as its use in kiosk technology. We’ve seen a number of amazing, high tech kiosks showcase some of the amazing uses of AR – so let’s take a look at some of the best.

Nissan Cube AR

Nissan used this AR kiosk at the 2011 Seoul Motor Show. The kiosk came with an interactive brochure that allowed users to interact with the car. When users changed page on the brochure, the kiosks showcased different parts of the car in 3D on-screen. Not only that, but when you turned the brochure around you could control your view of the car to create a virtual showroom.

Lego AR

Lego introduced these AR kiosks to children’s departments in a number of stores. The machines allowed children and parents to see what a specific box of Lego would look like before purchase. Individual boxes could be taken and shown to the screen in store and then the finished product would be displayed in 3D glory on top of the box in its full working order. Like Nissan’s attempt the box could be twisted for 360 degree views of the item and Lego even added animated characters to the kiosk screen to make things more exciting and allow users an exciting and engaging preview of the toy all thanks to the touchscreen kiosk.

Museums

Museums are using the kiosk and AR mixture in a number of ways and one of the best we’ve seen has been in the environmental mould. One American museum uses cards with images of endangered species to allow users to see their natural habitats on screen, as well as facts about each animal. In its non-kiosk form AR has been used extensively with smart phones in museums as a way for users to learn in a more interactive way about items in museums.

Tourism kiosks are also very popular for this reason and the AR and Kiosk mix has been used for a variety of great collaborations. We’ve seen a number of guidebooks and brochures that can be used with the kiosk to show case information, terrain and also history among other things. Essentially, kiosks and AR is a match made in heaven and the limit is often the creator’s imagination.

Christopher Rennicks has worked in the kiosk industry for a number of years and has written on the topic for a number of businesses.

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