Which Software or Plugin is best For 3D rendering ?

Kamrul-Islam there are many plug-in which are good for rendering. Popular one is Vray for3D Studio max, which is very easy to setup and render.

Here is a link to the tutorial which will help you get a studio light setup. http://viscorbel.com/studio-lighting-setup/

HDRi Image based lighting for vray

http://viscorbel.com/vray-hdri-lighting-tutorial/

you will get an idea how the vray work.

There is also Maxwell renderer which is physical based renderer and also a great option. 

This will show you how the maxwell render works

http://www.youtube.com/watch?v=Cp0nCCiN8nk

Thanks for invite me to answer. 

Actually it depends. If you are keen to learn about architectural modeling and rendering then3D Studio Max with V Ray plugin is the best. 

If you are concern about the visual effects or character animation and rendering then Maya is the best software. Although we can do character animation and rendering in Max also. 

i think the best renderer engine are sorted as follows

1- V-Ray

2- Final Render

3- Brazil

i think V-ray would be the best one for3D rendering.

VRay in3D Studio Max is quite amazing. Especially if you're rendering with the scene properly lit with shadows enabled. It really captures the depth of what you're rendering.

V ray

actually it depends on what u need to render:

for architecture modern styles use vray on3ds max.

but for old architecture and old styles (i mean crack on walls or dusty walls) i suggest mental ray.

for organics use mental ray because it has the best subsurface scattering material.

for cartoons u can use both of them.

the best rendering software for the product visualization is Keyshot

i hope this was useful.

3D Studio max With V-ray