Book Image

Building 3D Models with modo 701

By : Juan Jiménez García
Book Image

Building 3D Models with modo 701

By: Juan Jiménez García

Overview of this book

<p>Computer generated graphics (CGI) are part of the design market. CGI helps digital designers from many industries to have a clear representation of their products before they are produced. To name a few, interior designers, architectural studios, and furniture designers can implement CGI images into their workflow, saving them time and money.</p> <p>"Building 3D Models with modo 701" will introduce you to the world of next generation 3D content creation in a practical manner. This will not be a software manual, but a real-world guide that will skip the unnecessary details and focus on what's needed to complete a commission from a client. It will get you the best results in minimum time.</p> <p>In this book you will learn the entire process, from a preliminary design to the final art. All the stages are covered. You will be guided through modeling, creating materials, placing lights, optimizing your render, and showing it to your customer in an efficient way.</p> <p>You will learn how to quickly generate shapes and recreate real-world materials present in most of scenes: wood, metals, glass; along with working with textures and learning how to apply them convincingly. Create the mood of your scene by using lights, place the camera like a photographer would do to get that nice shot, and make a good quality realistic render and show it to your client with that extra punch of production that every pro should know.</p> <p>"Building 3D Models with modo 701" is not a user manual, but a step-by-step walkthrough of the real world of a 3D artist.</p>
Table of Contents (15 chapters)
Building 3D Models with modo 701
Credits
Foreword
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Montecarlo versus irradiance caching


Basically, there are two methods for calculating the final image in the render. Montecarlo is an algorithm that calculates the trajectory of the rays casted to get the correct shading. This method is tedious and filled with calculations, but totally accurate. The irradiance caching method is interpolated, so you get faster calculations, but they are lesser accurate.

Using the montecarlo method

The montecarlo (MC) method involves a complete calculation, with no interpolation at all. It works on a brute force calculation.

Let's get back to the box scene but with a light in the ceiling. The polygon acting as a light is just a material with the Luminous Intensity field enabled (see Chapter 3, Texturing and Materials for reference). To illustrate the MC method, we will disable Irradiance Caching and see what happens:

The MC method assigns a number of rays to the light source and then casts them from the light to the scene, just like in the real world. This is...