CATIA照片级渲染

1、CATIA照片级渲染,1,Photo Studio,CATIA Training Foils,Version 5 Release 9June 2002 EDU-CAT-E-PHS-FF-V5R9,CATIA照片级渲染,2,Course Presentation,Objectives of the course In this course you will learn how to create a photo realistic image Targeted audience New CATIA V5 users Prerequisites CATIA V5 fundamentals,0.5

2、 day,CATIA照片级渲染,3,Introduction to Photo Studiop.6 Workbench Presentationp.7 Accessing the workbenchp.8 User interfacep.9 General processp.15 Quick Startp.16 Environment managementp.18 Creating a box environmentp.20 Positioning the environmentp21 Dimensioning the environmentp23 Camera managementp.26

3、Creating a camerap.27 Positioning a camerap.28 Defining the camera lensp.30 Light sources managementp.31 Creating a spot lightp.33 Positioning a spot lightp.34 Defining the spot light parametersp.36,Table of Contents (1/3),CATIA照片级渲染,4,Shooting managementp.39 Creating a shootingp.41 Defining the fra

4、mep.42 Defining the quality parametersp.44 Computing the imagep.45 Textures managementp.46 Applying texture to the environmentp.47 Editing the environment texture propertiesp.49 Applying material to a componentp.50 Editing a material propertiesp.52 Stickers managementp.56 Creating a stickerp.57 Mapp

5、ing a stickerp.58 Adjusting a stickerp.61 Defining a sticker texturep.62 Defining a sticker lighting parametersp.63,Table of Contents (2/3),CATIA照片级渲染,5,Animation: Turntable managementp.64 Creating a turntablep.65 Defining the Turntable parametersp.66 Simulating an animationp.67 Computing an animati

6、onp.68 Animation: Animating scene elementsp.70 Creating an animationp.71 Adding elements to an animationp.72 Defining animated elements parametersp.73 Creating and modifying shotsp.74 Using catalogsp.75,Table of Contents (3/3),CATIA照片级渲染,6,Introduction to Photo Studio,In this lesson you will see V5

7、Photo Studio user interface and compute your first basic realistic image Photo Studio Workbench Presentation Accessing the workbench User Interface: Photo Studio General Presentation User Interface: Photo Studio tools User Interface: Photo Studio tools User Settings General Process Quick Start: usin

8、g the Quick Render Additional Information .,CATIA照片级渲染,7,You will learn about the Photo Studio Workbench by Accessing the Workbench Exploring the User Interface Understanding General Process,Photo Studio Workbench Presentation,CATIA照片级渲染,8,Accessing the Workbench,CATIA照片级渲染,9,Photo Studio tools.,Pro

9、duct tree,Standard tools,User Interface: Photo Studio General Presentation,Photo Studio features,CATIA照片级渲染,10,Scene editor: Environment Light sources Camera,User Interface: Photo Studio tools,Animation tools,Rendering: Image parameters Computation,Apply material and stickers,CATIA照片级渲染,11,User Sett

10、ings (1/3),Select Photo Studio,Select Display,Define the light source display mode,Define the environment display mode,Restart CATIA after modifying the parameters,CATIA照片级渲染,12,User Settings (2/3),Select Photo Studio,Select Output,Define the Quick Render parameters,Restart CATIA after modifying the

11、 parameters,Define the file name management,CATIA照片级渲染,13,User Settings (3/3),Select Photo Studio,Select Sticker,Restart CATIA after modifying the parameters,Define the default stickers image,CATIA照片级渲染,14,From a Product,Create an environment,Create a camera,Create light sources,Create a shooting,La

12、unch the computation,General Process,Define the components textures and stickers,CATIA照片级渲染,15,Quick Start: using the Quick Render,In this Quick Start you will discover thru a simple demonstration, the base of the creation of a photo realistic image using the Quick Render. The objective is not to co

13、ntrol all the parameters of the image, but to create quickly a realistic image from the 3D viewer display.,CATIA照片级渲染,16,Computation parameters: Default parameters have been predefined to help the user to get quickly a realistic image. If an active environment has been defined by the user, it will b

14、e taken into account by the Quick Render. If active lights exist in the session, they will be taken into account. If no light is active, a default light positioned at the current view point will be used. The image destination file can be defined in the settings. A precise size in pixels can be defin

15、ed for the image in the settings. Applying material: If a material is applied to a part being instanced in the product, all the instances will have the same attributes. Ex: the buttons You can also apply the material to the instance itself so that the same part has different effects in the image, de

16、pending on its instance.,Additional Information .,CATIA照片级渲染,17,Environment Management,In this lesson you will learn how to manage the scene environment What about environment? Creating a box environment Positioning a box environment Dimensioning a box environment Additional Information .,CATIA照片级渲染

17、,18,What about environment?,What is an environment? To make your image more realistic, you need to place the object you want to render in context. The environment is a geometry which will surround your object and will help you to create the context by applying textures to it. Which environments can

18、I use? CATIA Photo Studio provides 4 different types of environment: A box A sphere A cylinder Environment predefined using Realviz software Stitcher Depending the context you want to create, you will use one shape or another. For example, a spherical environment can be used to render a plane flying

19、 in the sky.,CATIA照片级渲染,19,A default box environment is created around the product Faces located between the view point and the product are automatically made transparent for the eye, but they will be reflected by reflective objects.,Select the Create Box Environment icon,Creating a box environment,

20、A new feature is added in the tree,CATIA照片级渲染,20,Modify the position of the environment using the standard tools of the compass,Position the compass on the environment,Positioning a box environment (1/2),Dynamically,CATIA照片级渲染,21,Select Properties in the environment contextual menu or double-click i

21、t,Select Position,Positioning a box environment (2/2),Using precise values,1,2,Define the coordinates of the box origin,Define the orientation of the box origin,3,4,CATIA照片级渲染,22,Select an edge of the box and drag it. This will apply a scaling centered on the box center.,Select a wall of the box and

22、 drag it. This will translate the wall.,Dimensioning a box environment (1/2),Dynamically,Global scaling,Wall positioning,CATIA照片级渲染,23,Select Properties in the environment contextual menu or double-click it,Select Dimensions,Dimensioning a box environment (2/2),Using precise values,1,2,Define the di

23、mensions of the box,3,CATIA照片级渲染,24,Additional Information.,Several environments can be defined in a session. An environment is activated using this option of its contextual menu,You can get the default geometry bounding box using this option of the environment contextual menu,CATIA照片级渲染,25,Camera M

24、anagement,In this lesson you will learn how to manage cameras Creating a camera Positioning a camera Defining the camera lens,CATIA照片级渲染,26,A camera is defined so that the resulting image corresponds to the current viewer view point,Select the Create Camera icon,Creating a camera,A new feature is ad

25、ded in the tree,Define a view point using the mouse manipulation,1,2,Camera display when selected:,Standard Camera display:,CATIA照片级渲染,27,Green point moves the origin point in the screen plane,Positioning a camera (1/2),Dynamically,Green square translates the origin point,Green square translates the

26、 target point,Green point moves the target point in the screen plane,CATIA照片级渲染,28,Select Properties in the environment contextual menu,Select Position,Positioning a camera (2/2),Using precise values,1,2,Define the coordinates of the camera origin,Define the coordinates of the camera target,3,4,CATI

27、A照片级渲染,29,Select Properties in the environment contextual menu,Select Lens,Defining the camera lens,1,2,Define the projection type. Perspective projection provides more realistic results.,Define the focal length. You should avoid small values as it will deform the object on the image. You should bet

28、ter take the camera away from the object.,3,4,This viewer can be used to define the position of the camera with the mouse manipulation tools. You can get the same view in the 3D viewer by double clicking the camera in the tree or in the viewer.,CATIA照片级渲染,30,Light Sources Management,In this lesson y

29、ou will learn how to handle light sources What about light sources? Creating a spot light Positioning a spot light Defining a spot light parameters Defining a surfacic light parameters Additional information,CATIA照片级渲染,31,What about light sources?,Light sources are not just used to light up the envi

30、ronment and make object visible. By generating shadows and illumination variations on the object surface, they give the image its effect of relief and make it more realistic. Which light sources can I use in Photo Studio? “Ponctual” light sources: A Spot light:It projects a cone of light from a give

31、n point to a given direction. It is the only type of light source which concentrates lights rays on a specific part of the scene. It is thus very useful to highlight details. A Point light:It scatters light in all directions from a given point like an electric lamp. A Directional light:The light rea

32、ches the scene in the form of parallel rays as if it had been emitted by a plane. It simulates light emitted by a very distant source such as the sun. Surfacic light sources, creating more realistic images by generating soft shadows: A disk area light to simulate spot light A sphere area light to si

33、mulate light bulb A rectangular area light that can simulate a distant light source A cylinder area light to simulate neons ramp,CATIA照片级渲染,32,Select the Create Spot Light icon,Creating a spot light,A new feature is added in the tree,Spot light display when selected:,Standard Spot light display:,The

34、 spot light effect is visualized in the 3D viewer,CATIA照片级渲染,33,Green point moves the origin point in the screen plane,Choose a view point using the mouse manipulation tools,Positioning a spot light (1/2),Dynamically,Green square translates the origin point,Green square translates the target point,G

35、reen point moves the target point in the screen plane,Compute the spot light position using this option. Only the origin coordinates will be modified.,CATIA照片级渲染,34,Select Properties in the environment contextual menu or double-click it,Select Position,Positioning a spot light (2/2),Using precise va

36、lues,1,2,Define the coordinates of the spot origin,Define the coordinates of the spot target After the target point, the spot is completely dark,3,4,CATIA照片级渲染,35,Select one solid edge of the spot light cone and drag it to define the cone angle,Defining a spot light parameter (1/2),Dynamically,Selec

37、t one solid edge of the spot light extremity and drag it to define the cone end. Outside the cone, no light is diffused.,CATIA照片级渲染,36,Select Properties in the environment contextual menu or double-click it,Select Lighting,Defining a spot light parameter (2/2),Using precise values,1,2,Define the int

38、ensity and the color of the spot light,Define the angle of the spot light,5,4,Define the length of the spot light ray. This moves the target point in the spot direction.,6,Define the linear attenuation,7,Define the angular attenuation,8,Activate the shadow generation at rendering time,9,Define the t

39、ype of “ponctual” light source,3,CATIA照片级渲染,37,Select Properties in the environment contextual menu or double-click it,Select Area,Defining a surfacic light parameter,1,2,Define the U and V samples The higher the values are, the less grainy the lighting will be. Computation time increases with the s

40、amples values.,Define the light source surface dimensions,5,4,Define the type of surfacic light source,3,CATIA照片级渲染,38,Additional Information .,Computation result with a “punctual” spot light,Computation result with a surfacic disk area light,CATIA照片级渲染,39,Shooting Management,In this lesson you will

41、 learn how to define all the image parameters What about shooting? Creating a shooting Defining the frame Additional Information . Defining the quality parameters Computing the image,CATIA照片级渲染,40,What about shooting?,CATIA Photo Studio shooting defines all the parameters that will be used for the c

42、omputation of a specific image from a given product. The parameters are sorted in 4 categories: The Frame parameters:You will define the scene (which environment, which camera, which light sources), the resulting image size and location. The Quality parameters:You will define the rendering quality p

43、arameters. These parameters will have a big influence on the computation time required for your image. The indirect illumination parameter:You will activate the use of the final gathering algorithm and define its parameters. The Animation parameters:You will define the number of images you want to u

44、se for the animation. These parameters will be detailed in the next chapter.,CATIA照片级渲染,41,Select the Create shooting icon,Creating a shooting,A new feature is added in the tree,CATIA照片级渲染,42,Define the camera you want to use for the computation You can use the current view point of 3D viewer,Defini

45、ng the frame,Define the environment you want to see on the image,Define the light sources you want to be used in the image,Define the destination and the format of the computation result,Define the image size The image is computed using the 3D viewer ratio. It is then deformed to fit into the define

46、d size. To avoid this deformation, define the ratio of the image size equal to the 3D viewer ration.,Select Frame,CATIA照片级渲染,43,Additional Information .,What is ray tracing? Ray tracing is a standard imagery mode. It is used by CATIA Photo Studio to create realistic images. How does it work? The ima

47、ge is divided in squares of pixels. The size of the squares is defined by the user. Ray tracing consists in calculating the color at each corner of each square of the image, considering a light ray from that corner in the direction in which the objects are viewed (camera viewing direction), followin

48、g that ray until it hits an object. If that object is reflective, the reflected ray is traced until it hits another object, and so on. The maximum number of reflections for a ray is one of the quality parameters. If the object is transparent, the ray is traced as it crosses the object. Each time the

49、 ray meets an object, the characteristics of the object are read at the point of incidence (color, reflection mode, transparency, etc.) in order to deduce the color of the corner of the pixel where the ray came from.,CATIA照片级渲染,44,Maximum number of reflections and refractions for a ray. Increasing t

50、his parameter will increase the computation time.,Defining the quality parameters,Activate the use of the objects textures for the image computation,Define the rendering accuracy using predefined sets of values,Activate the shadow computation,Select Quality,Activate the anti-aliasing,Define a custom

51、ized division of the image,Define a criteria for automatic subdivision of the squares,Define the maximum number of subdivisions,CATIA照片级渲染,45,Additional Information .,What is final gathering? Final Gathering helps to create very realistic imaging by creating very soft shadows. The general principal

52、is that the light striking the object is not only computed from the light sources but also from the other elements composing the scene, as in real life! How does it work? Light rays are sent from the objects points and, as the light bounces from one object to another, the light energy is computed on

53、 any surfaces surrounding the object. This is what is called indirect illumination. The user has to define the number of rays that will be sent at random from each pixel to calculate the indirect illumination factor. It will be multiplied by the material diffuse parameter coefficient.As a consequenc

54、e, no indirect illumination will be computed for materials with a null diffuse value. To improve performances, the user can use an interpolation algorithm from one pixel to another instead of computing real final gathering for each point.Maximum radius parameter defines the maximum distance between

55、a point having a real final gathering computation result and an interpolated one.Minimum radius defines the minimum distance between two points having a real final gathering computation.Increasing the maximum radius reduces the computation time, but can create artefacts due to the interpolation proc

56、ess.,CATIA照片级渲染,46,Additional Information .,Computation result without activating the final gathering,Computation result with activation of the final gathering,CATIA照片级渲染,47,Select Indirect Illumination,Defining the indirect illumination parameters,Activate the use of the final gathering for the ima

57、ge computation,Define the number of rays emitted by each object point.,Define the maximum radius value.If set to 0, this value is automatically computed according to the scene size.,Define the minimum radius value. If set to 0, this value is automatically tuned to 10% of the maximum radius.,CATIA照片级

58、渲染,48,Computing the image,Select the Render Shooting icon,Launch the computation,Using the contextual menu,Using the computation icon,Select the Shooting to render in the tree,Launch the computation,CATIA照片级渲染,49,Textures Management,In this lesson you will learn how to handle textures Applying textu

59、res to the environment Editing environments textures Applying material to a component Editing materials,CATIA照片级渲染,50,Select the wall in the tree,1,Select a texture file.,Applying textures to the environment (1/2),2,Scale the image so that it does fit on the entire wall,4,Flip the texture image in the U and V directions if necessary,2,Lock the texture size during the modification of the environment dimensions,3,