Explore the V-Ray Physical Camera and learn about the different functionalities it provides.
- [Instructor] The V-Ray render comes with a very powerful physical camera and some very powerful lights. Let's just quickly go through some basics of V-Ray camera and lights. In order to create a V-Ray camera, I camera go to the create panel, and under the camera rollout, I can choose V-Ray from the drop down list, and then I will choose V-Ray physical camera, and in any view port, I will simply left click and track the camera, and by holding the left mouse button, I can just set the direction. Now, for the purpose of this clip, I'm going to delete this camera because I've already created three cameras, and to choose a camera, if you ever find difficulty in choosing the camera, I have already selected them to the quick selection menu, so I'm going to choose my camera 03, and in my perspective viewport, I will press C to go to my camera view port, that is camera 03, and maximize my view port by pressing alt + W.
I'm going to go to the modify panel to see some option for my camera 03 that is currently looking into this direction of my interior scene. So this camera is a targeted camera. It's a still cam. And then we have some sensor and lens options. So if you're familiar with the real life DSLR cameras, you will be very comfortable with these settings. The film gate is the sensor, so you can go with a 16mm, or 35mm, or 36mm sensors that you can choose, and then there's the focal length for the lens.
So if you want a wide angle, you can go with a smaller value like 14. If you want a more zoomed in effect, you can go with a higher value such as 70, 100, 110. Then we have the aperture values, which are very important, and they go side by side with the lighting. Now, if you're familiar with the actual DSLR camera setting, the ISO is the value, so if I increase this to about like, 5,400, or 3,200, it's going to give me some extra light.
Similarly, the F number is something that if I bring back down, it will give me more light, but at cost of having shallow depth of field. The shutter speed, increasing the shutter speed would reduce any blur, the movement blurs that occur when an object is moving, but it will allow less light to enter the camera lens to the sensor, and lower the shutter speed would give you more light, but if you move the camera, then there are chances of getting the image blurred.
Now, I would recommend that if you don't know about these settings, you can go ahead and read about it, because you can really use them very well in V-Ray if you already know about these settings. Now, next is the color and exposure, and then we have the exposure and vignette. I will recommend that you use the vignetting effect inside Photoshop rather than choosing here inside the V-Ray camera. Then, we have the tilt and shift options, which are very important if you need to match your camera exactly to your reference image perspective.
So the tilt would allow a bit of a tilt to the lens, and similarly, the shift would allow a bit of shift to the lens. Now, these are helpful when you want to match your camera 100% with the perspective of your reference image. Then we have some options for the bokeh effects. These are when we have the depth of field being shallow, when the objects in the background are blurred, and the objects in the foreground are focused, and we see those hexagon shapes in the blurred objects that are in background.
That's what we call the bokeh effect, and we can adjust that from these options over here. Now, with this camera being set up, I'm going to quickly explain one thing with an example. So if I go ahead and render this out, this scene is going to take some time, maybe about like 20 minutes to get rendered, so I've gone ahead and already rendered this scene out, twice with two different settings that I'm going to quickly mention here. Now, by looking at this image, I can tell that the lighting is perfectly fine.
Nothing is over lit. Now I'm going to stop this render by pressing escape, and then closing this render view. Then, I'm going to bring in my image that I have already rendered with these settings over here. the film speed being 200, the f-number being four, and the shutter speed being 80. Now remember, I set this in the beginning, that these settings go with the lighting as well. So, I have increased the film speed to 400.
The f-number I reduced to 1.8, and the shutter speed to 60, and with exactly the same lighting set up when I rendered that scene out, this was the result I got, which was way more brighter. So, to repeat my point again, if you increase the ISO, decrease the f-number, and decrease the shutter speed, it is going to give you more light, just like I have here in my scene. So you need to know these values in order to control your lighting really well in the scene.
One way would be, you lock down these settings and play along with your lighting, or alternatively, you lock down setting with the lights, and then play with your aperture in the camera. Now next, we're going to quickly explore the lights inside V-Ray.
- Exporting and importing in Unreal Engine
- Adding lights and post-processing effects in Unreal
- Creating fog and PBR materials
- Exporting and importing in Unity 3D
- Lightings, cameras, and post-processing in Unity
- Lighting and materials in V-Ray
- Working with the Arnold renderer
- Lighting and materials in Redshift
- Quick rendering with KeyShot and Marmoset Toolbag