Vray rendering speed in a combination of factors affecting

In the VRAY factors that affect the speed involved in many aspects, in general there; model factors, material factors, lighting elements, render settings, factors, etc., these factors influence each other, mutual restraint.

First, the model of factors
From the distribution of photons can be the answer:architectural rendering VRAY rendering engine in the model area in each corner, have carried out intensive photon distribution, the four A, the model is relatively simple, photon density regions are more scarce. And Figure B in the corner because there are many models, the details, so the photon distribution in the corner area and more dense, it is these photons intensive rendering the calculation more time consuming. It can be concluded; more complex models (in particular, there are more small corner of the model), will spend more time rendering calculation.
Tip: the complexity of the model a greater impact on the rendering, the problem can be said that the "hardware injury." Sometimes, due to design requirements, the emergence of complex models can not be avoided. Therefore, the camera can only shoot through reasonable adjustments to the angle, to make such objects as little as possible in the camera's field of vision in the shooting. Of course, this also depends on whether the object is to show the body of the user.

Second, the material factors
Vraymtl material in the reflection on the speed.
Reflection: the higher the color intensity value more slowly, reflecting the more intense.
Gloss: These values ​​are more low-speed, the slower, more blurred reflection effect.
Segmentation: The higher the value, the slower, more delicate fuzzy particles.
Maximum depth: the more the number, the slower, reflecting the more abundant.
Vraymtl refraction of the material in the speed of the shadow.
Refraction: the higher the color intensity value more slowly, reflecting the more intense.
Gloss: This value is the more low-speed, the slower, more blurred reflection effect.
Segmentation: The higher the value, the slower, more delicate fuzzy particles.
Maximum depth: the more the number, the slower, reflecting the more abundant.
Translucent: commonly used in the simulation "wax", "water" or "3S" material. Turn will increase the rendering time.
VR map in the reflection on the impact of speed
Reflection: channel intensity value, the higher this value is reflected more strongly.
Gloss: This value is the more low-speed, the slower,3D rendering more blurred reflection effect.
Segmentation: The higher the value, the slower, more delicate fuzzy particles.
Maximum depth: the more the number, the slower, reflecting the more abundant.
VR in the map reflects the impact of speed
Reflection: channel intensity value that reflects the more intense the higher the
Gloss: This value is the more low-speed, the slower, more blurred reflection effect.
Segmentation: The higher the value, the slower, more delicate fuzzy particles.
Maximum depth: the more the number, the slower, reflecting the more abundant.

Third, the light factor

Lighting intensity, the greater the slower the speed. Be noted that: not only in the light intensity in this problem, for Vray rendering engine (second bounce) and intensity (daylight) light intensity and so there is the problem.
The breakdown in Vray also determines the speed of breakdown of the higher value, more slowly, but the shadows are more delicate.
Tip: In the rendering speed of light in addition to the factors affecting these two points, how much light can also affect the number of rendering speed. In the same render settings, with the increase in the number of light rendering speed will be slow, which is why night time renderings rendering renderings tend to cause more than during the day.