What you will eventually find are these HDRI material previews. It is certainly not a high dynamic range of image. You want to avoid the ones that look like actual CINEMA 4D scenes as well as the ones that look like images and they especially avoid anything that ends with. This is going to bring up a list of images and scene files that have the word HDRI in them and some of them are good candidates and others aren't. So click on Search and then just type in HDRI and hit Return. Inside of here are a number of different folders, but I like to use the Search functionality to find what I'm looking for. Now to get to where I am now what I want you to do is if you have your Search Window open, close it, and if you haven't yet, click on this Presets ink well that will take you to the main Presets folder. I typically just go to the content browser where I have all of my presets from CINEMA 4D. Now you can find them on the Internet, you can try and take them yourselves. To get this set up for HDRI lighting let's grab an HDRI image. That's where HDRI lighting is really a hero. Let's say we are under a deadline, and we need something that looks good quick. Now I might want to come in here and add a bunch of lights and really tweak those, but I don't have the time let's say. We have that same cruddy automatic lighting, but we do have a little bit of interest now with the reflections on the edges of our objects. Press and hold on the floor and select the Sky object and render again. But we don't see any reflection, because they're in a black environment. They have got a white material on them with a little bit of reflection. A CFL light bulb in the front and a few in the back. The scene that I have right here is a simple MoGraph scene I have got. Let's take a look at how we can use an image like this to light our scene. These images were probably brought into the computer after the fact and taken into a program like HDR Shop which allows you to take these images and composite them to get together into a single finished. This allowed them to capture an image with incredible levels of information about Brightness. But in addition to doing that just for the panorama, they also took pictures at different exposure levels by adjusting the shutter speed. To get this panorama, somebody probably went out and used a panoramic head on a tripod and rotated it around 360 degrees taking a number of pictures. An HDRI image is actually composite of a number of different images. What you will see is I am not ten stops lower in brightness, and I still have image detail, and that's because of the way that HRDI images are taken. So taking a look at this HDRI image if I go into my Filter and adjust its exposure, I can bring the Exposure up just like I did with the other, but I can also bring my Exposure down significantly. Now if I go to a 16-bit or 32-bit image which is the standard for an HDR image, we end up with millions of levels of brightness. Now the underexposed areas I can increase the exposure on and do all right, but I am limited, and that's because this image is an 8-bit image, and that means that there are only 256 levels of possible brightness. The sun is just overexposed, and there is no salvaging in it. So if I bring my Exposure down what we will eventually see is that I am just darkening my entire image uniformly. If I go into my Filter tab, what I can do is enable my Filter and adjust the exposure of this image, and as any one who has tried to play with Levels in Photoshop knows, I am going to be able to shift of this around, but at some point I am going to lose detail. The first is an 8-bit, image and don't let this name fool you, it's not an HDRI. In my Picture Viewer, I have opened two images. Image-based lighting using HDR images can give you really fantastic lighting with a minimum of effort.
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