VR has three main meanings:
The first virtual reality is to generate realistic entities with the help of computers, and "entities" are for people's feelings (seeing, hearing, touching and smelling);
The second user can interact with this environment through human natural skills, which refer to other human actions such as head rotation, eye movements and gestures.
The third virtual reality often relies on some three-dimensional devices and sensing devices to complete the interactive operation. In recent years, VR has gradually moved from laboratory research projects to practical applications. At present, it has been widely used in military, aerospace, architectural design, tourism, medical care, cultural entertainment and education. In China, projects related to VR have been included in the plan, and the research and application of VR are in full swing.
Virtual Reality, referred to as VR for short, or spirit realm technology, is actually a computer system that can create and experience a Virtual World. This kind of virtual world is generated by computer, which can be a representation of the real world or an imaginary world. Users can interact with the virtual world naturally by means of various sensing channels such as vision, hearing and touch. It creates a three-dimensional virtual world that reflects the changes and interactions of physical objects in real time by simulation, and provides users with a three-dimensional interface to observe the interactions with the virtual world through auxiliary sensing devices such as HMD and data gloves, so that users can directly participate in and explore the functions and changes of simulated objects in their environment, resulting in immersion. VR technology is the crystallization of high-tech integration such as computer technology, computer graphics, computer vision, visual physiology, visual psychology, simulation technology, microelectronics technology, multimedia technology, information technology, stereoscopic display technology, sensing and measurement technology, software engineering, speech recognition and synthesis technology, man-machine interface technology, network technology and artificial intelligence technology. Its fidelity and real-time interactivity provide strong support for system simulation technology. It has immersion, interaction and imagination at the same time, so that people can immerse themselves in it, transcend it, get in and out of nature, and form a multi-dimensional information environment with interactive efficiency.
Immersion refers to the user's sense of reality in the virtual world, which will make it difficult for users to perceive and distinguish that they are in a computer-generated virtual environment; Interactivity refers to the user's operability of objects in the virtual world; Imagination means that users can acquire knowledge in all directions, exert their subjective initiative and seek perfect solutions to problems by relying on their own perception and cognitive ability in the multi-dimensional information space of virtual world. The fundamental purpose of researching and developing VR technology is to expand human's cognitive and perceptual abilities and establish a harmonious man-machine environment.
VR technology is one of the emerging technologies in system simulation. In fact, it is a technology that uses computer technology to create a simulated imaginary world. The computer is used to create a dynamic and three-dimensional visual environment of the simulated world, which makes the operator feel immersive. With this new technology, participants use hardware, such as keyboard, data glove, 3D mouse, trackball, joystick, space ball, eye tracking device, ultrasonic head tracker, helmet display, video recording equipment, large-screen color projector, stereo goggles, stereo, headphones, voice recognition and synthesis device, workstation and data suit, etc. to obtain the required perception and experience the computer world.
VR, the abbreviation of VRay
, is a plug-in rendering plug-in of 3DsMax.
features of vray:
there are two packaging forms of vray light and shadow tracing renderer: Basic Package and Advanced Package. Basic Package has proper functions and low price, which is suitable for students and amateur artists. Advanced Package contains several special functions, which are suitable for professionals.
the features provided by the software package of p>Basic Package
Real light and shadow tracking reflection and refraction. (See: VRayMap) ?
smooth reflection and refraction. (See: VRayMap)
· p > translucent materials are used to create paraffin, marble and frosted glass.
surface shadow (soft shadow). Comprises a cube and a sphere emitter.
indirect lighting system (global lighting system). Direct illumination (brute force) and illumination mapping (HDRi) can be adopted.
motion blur. Include a sampling method similar to Monte Carlo.
camera depth of field effect.
anti-aliasing function. Including fixed, simple 2-level and adaptive approaches.
defocus function.
G- buffer (rgba, material/object id, z-buffer, velocity, etc.)
the features provided by the advanced package software package
include the following functions besides all basic functions:
anti-aliasing function based on g-buffer.
save and load support can be reused. Sampling can be increased for fly-through animation.
photon map (save and load support) can be reused.
motion blur with analysis sampling.
really support HDRI mapping. Contains *.hdr, *.rad picture loader, which can handle cube map and corner map coordinates. It can be directly mapped without deformation or slicing.
a natural surface light source that can produce correct physical lighting.
natural materials that can be calculated more accurately and quickly.
distributed rendering based on TCP/IP protocol.
different camera lenses: fish-eye, spherical, cylindrical and cubic cameras
Network license management enables you to use VRay system on the network with less authorization.
Vibration Reduction-shake reduction and anti-shake technology
vibration reduction corrects the light that bends when shaking through the adjustment of a set of magnetic suspension lenses and built-in induction systems such as gyroscopes, so as to ensure the clarity of the picture to the maximum extent and improve the three-speed shutter. Such technology is a boon for beginners. More importantly, VR technology can also correct and reduce the user's vertical jitter when panning horizontally and the horizontal jitter when panning vertically, making the picture more dynamic and expressing the author's intention more clearly. An optical technology that can improve the image blur caused by camera vibration, and can shoot quickly when the shutter speed is reduced by three steps, allowing clear photos to be taken with a telephoto lens. When the photographer shoots a moving object, the system will even automatically detect the movement of the camera. VR operation can only be performed on individual Nikon cameras. Nikon's original lens can provide unique defocus image control function. The front end of the lens has a defocusing positioning rotary ring, and the aperture values on the ring are from F2 to F5.6***4, which are marked on the left and right of the ring respectively, and are indicated by R and F.. This is a special fixed-focus lens, whose biggest feature is that it allows fuzzy control of the background or foreground of a specific subject in order to obtain the best out-of-focus imaging, which is very valuable when shooting portraits, and it can also help us control all parts of the photo according to what we want to express, which is unmatched by similar lenses from other manufacturers.