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Photographic Rendering with V-Ray for SketchUp
Photographic Rendering with V-Ray for SketchUp

Photographic Rendering with V-Ray for SketchUp: Turn your 3D modeling into photographic realism with this superb guide for SketchUp users. Through concrete examples, screenshots, and images, you'll learn the practical side to photographic rendering using V-Ray.

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Photographic Rendering with V-Ray for SketchUp

Chapter 2. Lighting an Interior Daytime Scene

If you are using both SketchUp and V-Ray as part of your creative toolset, there is a very high probability that you are going to be producing at least some architectural renders as a part of your day-to-day work. This invariably means that at some point you will either want or need to try your hand at creating a natural-looking daylight interior render. This will require an ability to create an efficient and believable daytime lighting setup. In this chapter, we will make use of our Daylight_Interior.skp files to see how easy it is to create such a setup in V-Ray Version 2.0 for SketchUp.

Looking at our SketchUp scene


To take a look at the first of the scene files that we will be working with throughout the duration of this book, you may want to load the Daylight_Interior_01.skp file from the Exercise_Files folder that has been provided as a downloadable resource.

This scene contains a small gallery type building that has been designed and created to give us both interior and exterior spaces in which we can work at creating lighting, materials, camera composition, and so on, as well as providing a number of challenges that we will need to overcome as we move forward with our project.

We have also, by design, only populated one of the interior rooms in this building, leaving you free to add your own set dressing to other areas, using them to do your own exploration and experimentation with the concepts and tools that we will discuss throughout this project.

Note

I would, at this point, encourage you to use every opportunity that you come across in this project to take the essence...

Defining our goals


Now, although we have already demonstrated in our first chapter that we can pretty much jump straight in and start creating renders using the default lighting setup when using V-Ray in SketchUp, I feel the need to state quite emphatically that such an approach is in reality a long way short of ideal when it comes down to the work of creating photographic renders. Our first order of business when getting started on a project should always be to thoroughly develop the goals and aims of the project itself.

Time spent in breaking down the goals and then working out how to match our stated goals with the tools that we have available will not only save us a lot of unnecessary trial and error throughout the course of the project, but can actually lead us toward artistic choices, technical options, and even final results that may otherwise have been completely bypassed in pursuit of a quick turnaround.

Note

Of course, at times the urgency of a project may force us to simply dive...

The lighting workflow


Now that we have the goal for the lighting in our scene clearly defined, the next step is to outline the approach we are going to take and the tools we are going to use in order to create that lighting solution for ourselves. Again, we could quite easily jump in and probably use the default Sun and sky system in V-Ray, which has been designed with the goal of creating natural-looking daylight in mind.

The problem with diving in isn't necessarily the lack in quality that such an approach will produce, but rather the lack of artistic development that it can foster. Remember, a good photographer is, generally speaking, an artist first and a technician second. He/she is someone who has learned how to utilize the technology at their disposal as a means to an end in the pursuit of their artistic vision. Ultimately, it is their understanding of what makes a photograph good along with their artistic sensibility that will allow them to create the kind of high quality images that...

Sunlight is our key light


The place to start when working on any kind of lighting design is to decide exactly what will constitute the key light in the environment. This is the light that provides the main source of illumination for the render and is also, generally speaking, the main shadow casting light.

In a daylight setting, it doesn't take a lot of figuring to realize that our key light would most likely be the Sun. The question is, which of the available V-Ray light types should we be using as our Sun? This, I suppose, could seem like a silly question given that we have already highlighted the availability of the V-Ray Sun light type.

Well, V-Ray does offer other light types that could almost as easily be used as a sunlight in the scene. In V-Ray Version 2.0, we have the Omni, Rectangle, Spot, Dome, Sphere, and IES light types, which are all readily available at the click of a button in the VfS:Lights toolbar.

The beauty of these particular light objects is that they are free of the inherent...

Skylight is our fill light


Just as it is obvious that in most daylight scenarios the Sun will be the dominant and therefore key light, it is also very clear that without the secondary or Fill light that comes from the Sky, what we call "natural daylight" would probably not look so natural at all.

Essentially the Sky acts as a giant diffuse reflector that is able to cast at least some level of illumination even into areas of an environment that direct Sunlight could never hope to reach. In this respect, the Sun & Sky system form a perfect lighting partnership—one that we often fail to fully appreciate for both its technical complexity as well as its aesthetic beauty.

Besides adding almost perfect illumination coverage for an environment, we also need to take into account the fact that Skylight can and often does add quite a strong color cast. Again this is not something that we generally appreciate or possibly even notice due to the automatic color balancing that our eyes and brain typically...

Summary


Let's quickly summarize the elements of creating a daylight solution for photographic rendering that we have covered in this chapter.

The first thing we need to keep in mind is that unless we approach every aspect of creating a photographic render with a clear, well thought out plan, there is a very good chance that we will fail to hit the required mark, whether that is one we set personally or by our client. We also need to make certain that our plan is put down as a permanent record somehow, be that written, painted, photographed, or compiled.

We also need to work smart. Rather than trying to reinvent the wheel each and every time we work on a new project, we should already have learned to work with a few tried and tested workflows that will get us most of the way towards a finished solution in a very short space of time. We also need to note that when working on lighting, every new light added to a scene should be test rendered in isolation, giving us a clear view of the illumination...

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Table of Contents

10 Chapters
Diving Straight into Photographic Rendering Chevron down icon Chevron up icon
Lighting an Interior Daytime Scene Chevron down icon Chevron up icon
Lighting an Interior Nighttime Scene Using IES Lights Chevron down icon Chevron up icon
Lighting an Exterior Daylight Scene Chevron down icon Chevron up icon
Understanding the Principles of Light Behavior Chevron down icon Chevron up icon
Creating Believable Materials Chevron down icon Chevron up icon
Important Materials Theory Chevron down icon Chevron up icon
Composition and Cameras Chevron down icon Chevron up icon
Quality Control Chevron down icon Chevron up icon
Adding Photographic Touches in Post-production Chevron down icon Chevron up icon

Customer reviews

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Rating distribution
Full star icon Full star icon Full star icon Half star icon Empty star icon 3.3
(13 Ratings)
5 star 30.8%
4 star 15.4%
3 star 15.4%
2 star 30.8%
1 star 7.7%
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Jeffrey Yap Jun 18, 2015
Full star icon Full star icon Full star icon Full star icon Full star icon 5
Very clear explanation of the processes involved especially if you follow the down loadable exercises. I strongly recommend this for anyone who wants to fully exploit the full potential of VRay for Sketchup.
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Amazon Customer Apr 09, 2015
Full star icon Full star icon Full star icon Full star icon Full star icon 5
Brian Bradley has a really good way of teaching this subject, if you get the chance, watch his videos on Lynda.com.This book will teach you to do realistic renderings and also allow you to experiment with a solid foundation that this book gives you. Excellent
Amazon Verified review Amazon
Amazon Customer Dec 09, 2016
Full star icon Full star icon Full star icon Full star icon Full star icon 5
Isn't only a good book, is a good tool for everyone interested in learn to use vray for sketchup.
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SuJo Jun 22, 2014
Full star icon Full star icon Full star icon Full star icon Full star icon 5
Photographic Rendering with V-Ray for SketchUpAt first I was rather skeptical about this book, I was always interested CG rendering and 3D design and this book seemed like a good direction to take. I really enjoyed the hands on approach, make sure you download the code documents in order to follow along. While SketchUp is free for educational uses as mentioned on their website it is worthy to note it didn't feel limited in any way compared to the paid version. Setup was pretty easy under Windows 8 and everything went without a hiccup.Chapter 1 set the pace and I was already sold on this book, then I was wondering why are there so many chapters on lighting! Well from my experience with 3D game techniques it's really hard to mimic light! So for me the three chapters were needed but also very well written, from the daytime scene to night and final touch ups, what an awesome transformation. If you are not into math you should really get into it for this, light is very tricky and in order to understand it you will need some working level of math on a higher level. If you're anything like me that is very limited but your willing to keep pushing forward until you understand it, don't feel bad I had to go over this a few times. I did get my ah-ha moment though.I think it is extremely important to mention the quality control chapter, it has got to be one of the best things I've seen since toasted sliced bread! DO NOT SKIP IT, if you really want your work to shine take the extra steps to perfect it. No shock that you will be adjusting the lighting quality here again! I would give this book a 10/10 or 100/100 if I could, I know it isn't going to take my hand and walk me down the path of using SketchUp overnight, and that isn't why I purchased this book. I wanted to see what goes into the "behind the scenes" with CG level animations and rendering, this book didn't disappoint me. The material was covered well and I felt like I was making progress, don't feel bad if you tinker around with the settings and divert from the book. I find it sticks in my mind better if I go a bit off course!Publisher: [...]
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Ar.Nitin Sharma Jun 13, 2014
Full star icon Full star icon Full star icon Full star icon Empty star icon 4
The material is sufficiently detailed though not for beginners learning vray-SU. I would have rated this 5 stars if the images had been in colour instead of black & white. Though the colored versions are available for download from the book's website. Decent purchase!
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