Introduction To Ventuz Previs

This document is an overview of what a pre-vis scene is and its potential applications.

Introduction

The Previs features introduced in Ventuz Version 7 provides a very powerful method of previsualizing an entire project or single scene as it will look when it is setup in the real world.

In addition to the visual aspect of this feature, it also assists in the automatic creation of elements inside of the Render Setup for the project in which the Previs scene is created.

Using Previs features will help in the design and verification of assets and information and is also a great help whenever you need to present a functional mock up to your client.

Previs Workflow

Previs Scenes can contain many 3D and 2D objects which can represent a complete visualization of your existing venue or stage. You can make use of several to create Previs scenes:

	Screen	Creates a previsualization screen, which represents a real screen or wall.
	Composition Projector	Creates an orthogonal projection of a target content layer.
	Previs Canvas	A pure previsualization Layer which will usally not used on a production environment.
	Screen Render Options	Forces the engine to render a Canvas multiple times with different resolutions and/or cameras
	Composition List	Provides an Array of available Compositions

A Previs scene can be a range from a simple setup using one or several 2D Screens to complex 3D Scenes with several Multi GPU driven machines using all available outputs.

Ventuz previsualization capabilities have a the ability to cover:

• Simple screens - based on simple resolution settings
• LED Walls - each with a unique pixel pitch
• LED Wall Tiles - arranged in abstract shapes and rotations
• Movable screens or projectors
• Displays with bezel compensation
• Viewing a Previs Scene in Virtual Reality using Head Mounted Displays (VR-Headset)

Ventuz can use or import several kinds of geometry files. A stage setup that has been created in an external program can be imported to Ventuz and added to. Standard units in this 3D object file can be used inside of Ventuz to easily apply a screen or LED wall to the geometry that is imported, removing the guess work.

A Previs Canvas can be assigned to an output of Ventuz inside of the Render Setup Editor to view the Previs Scene in a physical Ventuz output.
While the preview inside of Ventuz is limited to 4096 when viewing inside of the Renderer Window, there is no limit when outputting from Ventuz; ie. not viewing in the Designer and is assigned to a Runtime. In this case, the resolution limit is the same as other rendered scenes, the max texture size of the graphics card: 16K.

How to Access

To create a Previs Scene, follow the How to create a previs scene guide.
Another great resource about the concept of a previs scene and using multi screens and multi outputs is the Multi-Screen/Output Workflow page.

Conclusion

From pre-production to the final setup, Previs can create a complete picture of how any setup can or will look, no matter how simple or complex.