In your Windows system's Documents folder located in C:\Users\Documents\houdini18.5, open the file named houdini.env with a text editor.Īt the bottom of the houdini.env file, add the following new line: The file path should look like D:\CitySampleSource\Small_City. Once extracted, a folder named Small_City is added. The remainder of this guide assumes you are using a similarly named and placed folder path.Įxtract the content of CitySample_HoudiniFiles.zip file to your folder. For the purposes of this guide, the save location used is D:\CitySampleSource. It contains the Houdini source files required to complete this guide.Ĭreate a new folder to save the source files to. In the root directory where your City Sample project is saved, locate the CitySample_HoudiniFiles.zip file. You also need to specify and create some directories used later in this guide to store data for your city. While Unreal Engine and Houdini support Mac and Linux, the workflows and source files have not been tested with those systems and we cannot guarantee they will work as intended.īefore you can effectively use Houdini to start generating your city, you first need to set up a few things on your computer, including extracting the source files needed to complete this guide. The workflow and files used in this guide work with the Windows 10 operating system. This guide assumes you have working knowledge of Houdini and using its tools. Refer to the City Sample Recommended System Specifications.ĭownload the City Sample Unreal Engine 5 project through the Epic Games Launcher. For bigger cities, you can expect to use from 5 to 10 GB of space. You need to run Houdini once to generate the startup files necessary for the Required Houdini Project Setup.Īt least 2 gigabytes (GB) of free hard disk space to extract the data and generate small-sized cities. We recommend you use version 18.5.532 since it's the version used to develop the City Sample project. Generate all the necessary data which can be exported and ready for import into Unreal Engine 5. Specify zones and define the silhouette of your city.Ĭreate a road network that supports a freeway system. Setup the basis for your city shape, size, and layout. Setup and configure Houdini with the provided source files. This guide is part one of a two-part series that walks you through the process of creating your own city with a road network and freeway system in Houdini Engine using Epic-developed tools.Īccess the Houdini Source files to create your own city. The City Sample uses the data generated from Houdini to populate assets, drive simulations for artificial intelligence, traffic, and audio, and much more. The City Sample project is a technical demonstration of how you can use procedurally generated data from SideFX's Houdini Engine in Unreal Engine 5 to create a working simulated world. Step 11 - Generate the City Caches and Export Data Step 10 - Adjust the Cityscape and Buildings Volume Step 9 - Create a Freeway Connection to the City Step 8 - Assemble Your Inputs in the City Processor Step 7 - Drawing the Freeway Path Through the City Step 6 - Draw City Zone and Adjust Cityscape Step 3 - Starting the City Creation Process by Defining the City Shape Step 2 - Creating a Directory for Your City
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