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Photo Studio Optimizer��

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Photo Studio Optimizer

CATIA V5 TrainingFoils

Version 5 Release 19September 2008

EDU_CAT_EN_PSO_FF_V5R19

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Photo Studio OptimizerObjectives of the courseUpon completion of this course you will be able to use the various Photo Studio Optimizer tools to enhance the quality of your photo realistic images.

Targeted audienceIndustrial Stylists and Designers

PrerequisitesCATIA V5 Fundamentals, Photo Studio

0.5 day

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Table of Contents (1/2)

Introduction to Photo Studio Optimizer 5Accessing the Photo Studio Workbench 6User settings: Photo Studio 73D Textures 8

Bump Mapping 12What is Bump Mapping? 13Defining the Bump Mapping Parameters 14

Global Illumination 16What is Global Illumination? 17Setting the Light Parameters for Global Illumination 18Setting the Shooting Parameters 19

Caustics 20What about Caustics? 21Setting the Light Parameters 22Setting the Caustic Parameters 23

Visual Effects 24What about Visual Effects ? 25Setting the Depth of Field 26

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Table of Contents (2/2)

Defining the Glow Parameters 27Cartoon Rendering 28

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Introduction to Photo Studio OptimizerIn this lesson you will see V5 Photo Studio Optimizer user interface

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Accessing the Photo Studio Workbench

You can access the Photo Studio Workbench by clicking on Start > Infrastructure > Photo Studio

Photo Studio Optimizer is a set of advanced capabilities which are added to the original capabilities of the Photo Studio workbench.

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Using Photo Studio settings, the rendering computation can be automatically distributed on remote workstations through a network. The rendering time is drastically reduced, particularly for huge mock-ups.

User Settings: Photo Studio

Declare the workstations (satellites) here (installation and customization on satellites is required)

The local host will allocate and distribute all the necessary data to the participating satellites, which, in turn, will process the rendering then return the final result back to the local host.

Click on ‘Tools > Options > Infrastructure > Photo Studio > Satellites’

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Up to 8 CPU can be used simultaneously. All platforms are available.

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3D TexturesIn this lesson you will learn how to use 3D textures on components.

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What is a 3D Texture?

What is a 3D texture? When using a 2D texture, a picture file is projected on the object using a specific projection method.Using a 3D texture is as sculpting the object directly in the material. The texture is very realistic and gives the illusion of relief. It can be customized through its own parameters (examples : complexity, amplitude, turbulence,…)

Which 3D textures can I use? CATIA Photo Studio Optimizer provides 5 different types of 3D textures:� Marble� Vein� Alternate vein� Rock� Chessboard

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Click on the ‘Texture’ tab

Applying a 3D Texture

Select the 3D texture from the list

Select the material properties

In real time in the 3D viewer, the corresponding texture image is mapped onto the geometry to give a rough visualization of the effect.

The final result is only seen in the rendered image.

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Activate the ‘ray traced preview’ to visualize the final result in the dialog box

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Editing a 3D Texture

Define the main color of the material

Define the object surface perturbation

Define the complexity of the motif of the texture

Position and scale the texture

Define the bump mapping

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Bump MappingIn this lesson you will learn how to use bump mapping.

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What is Bump Mapping?

The bump mapping allows to simulate, using lighting effect, a perturbation of the surface of an object.

This simulation modifies the aspect of the surface of the object. The perturbation is computed based on the contrast of the texture pixels.

For example, bright colors are displayed above dark colors, creating a 3D effect on the object.

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Access the material properties from the contextual menu

Defining the Bump Mapping Parameters (1/2)

Value of Bump parameter:• 0: no bump effect• >0: bright color above dark color• <0: dark color above bright color Bump mapping is also

available for 3D textures

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Select the Texture tab2

Define the Bump mapping amplitude

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Defining the Bump Mapping Parameters (2/2)

Computation result with activation of the bump mapping

Computation result without activating the bump mapping

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Global IlluminationIn this lesson you will learn how to create more realistic images using the global illumination.

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What is Global Illumination?

photons

What is global illumination?Global illumination simulates indirect illumination of objects by reflection of light coming from diffuse surfaces.This functionality allows indirect lighting effects among which caustics and color bleeding.

What are photons?Photons are energy particles emitted into the scene by a light source.Once emitted, these energy particles take different paths as they bounce from one object to another.A photon path can evolve in two ways:- photons are either absorbed by an object they hit (through reflection or transmission) and in that case the path ends- photons get lost in space without hitting another object and the path is infinite.Maximum number of reflections and refractions are defined by the user

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Setting the Light Parameters for Global Illumination

From the contextual menu of the light, click on ‘Properties’

Select ‘Indirect Illumination’

Activate photon emission

Set the intensity factor (0 to 100). It corresponds to the light intensity of the photons. It will be combined with the intensity parameter of the “Lighting” tabIt is recommended to be close to 1

Define the maximum number of photons to be used for the computation of the image (10.000 to 10.000.000).A low value can create puddles

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Setting the Shooting Parameters

Define the number of photons to be used to compute the global illumination intensity for each pixel (1 to 10.000).

Define the area where photons have to be used to compute global illumination intensity for each pixel.Automatic computation is done if value is 0

Double-click the shooting in the tree


Activate ‘Global illumination’ computation

Do not take into account object ambient coefficient for rendering computation

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3Activate ‘Global illumination’ computation

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CausticsIn this lesson you will learn how to use caustics.

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What about Caustics?

What are caustics?

Caustics can be defined as small localized lighting effects created by specular light interactions (reflection or refraction) onto a diffuse surface.

A typical example of caustics would be the light pattern cast on the bottom of a swimming pool by the wave pattern on the water surface.

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Setting the Light Parameters

Select the Properties from the contextual menu of the Light source.


Activate photons emission

Define the maximum number of photons to be used for the computation of the caustics (10.000 to 10.000.000).This number must be lower than the number defined for global illumination

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Setting the Caustic Parameters

Double-click the shooting in the tree


Activate caustics computation

Define the number of photons to be used to compute caustics for each pixel (1 to 10.000)

Define the area where photons have to be used to compute caustics for each pixel.Automatic computation is done if value is 0

Do not take into account object ambient coefficient for rendering computation

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Visual EffectsIn this lesson you will learn how to add visual effects.

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What about Visual Effects ?

Depth of field : This visual effect makes objects that are not in focus (far from the camera target) appear blurry, thus giving a sense of depth to the image

Glow: This effect generates a halo around bright pixels of the rendered image. This glow not only gives an impression of greater brightness, but it can also interfere with the visibility of nearby pixels, thus improving the realism of images by adding effects which perceptually expand and enhance the perceived dynamic range. This effect is obtained thanks to a filter applied onto the image at the end of the rendering as a post-processing.

Depth of field and glow effects work independently from each other.

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Setting the Depth of Field

Define Confusion radius (radius of the camera origin from which rays are sent)The smallest the radius, the sharpest the result

Select the Effects tab

Sharp area

Blur area

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Activate the Depth of field

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Defining the Glow Parameters

Define the parameters : • Threshold : pixel intensities to be processed for

glow effect• Intensity : how bright the glow will be• Size : size of the glow• Flare intensity : makes the rainbow more or less

visible• Flare diffusion : Set the width of the rainbow• Radial line size : size of the streaks• Star effect : length and arrangement of the streaks


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3Activate the Glow

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Cartoon Rendering (1/2)

You will learn to generate a rendered image showing the drawing of contours around the geometry to create a cartoon-style effect.

Activate ‘Cartoon’

Adjust the various parameters for Cartoon:• ‘Contours only’ : display only the

contours of the drawing• ‘Contour thickness’ : thickness of the

contour line when using ‘Contours only’or ‘Ink pen effect’

• ‘Ink pen effect’ : Make the thickness of the contour line dependent on its orientation


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Cartoon Rendering (2/2)

Ink pen effectThickness : 0.5

Ink pen effectThickness : 0.1

Contours onlyThickness : 0.5

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To Sum Up ...

In this course you have seen:

How to use 3D texturesHow to use bump mappingHow to use global illuminationHow to compute causticsHow to add visual effects