Exercise 11.2

Transparency Maps & Bump Maps

Introduction:

In this exercise, you create bump maps and transparency maps to enhance textures. You will work in Photoshop as well as Rhinoceros for this exercise.


Part 1:

  1. Create a simple vertical surface that is at least 4’ high and 8’ long. Create a cube or other shape (2’x2’x2’) that sticks out from this vertical surface.
  2. Follow V-Ray Tutorial 8.1 to create basic rendering settings for your drawing. Please also select 640×480 as your output size in the Output section of the Render Options Window. Uncheck the Show GI Only box in the Lighting Settings of the Global Switches (you will establish a directional light in step 4).
  3. Follow V-Ray Tutorial 8.5 to create a V-Ray Infinite Plane below your object.
  4. Create a basic directional light (Rhinoceros Tutorial 5.17) to highlight your objects.
  5. Establish a saved (named) perspective view of your object. Save your Rhino .3dm file, you will use it later.

Part 2:

  1. Navigate to the course website and download a sample material from the Resources>Collage Textures section of the website. For this part, select a material that should have some transparency. (For example, some of the metals, some of the bricks, etc.)
  2. Open your selected image in Photoshop CS3.
  3. Follow Photoshop Tutorial 1.21 [transparency maps] to create a transparency map for your selected image. Save this image to a Materials folder on your flash drive with “_transparency” appended to the file name.
  4. Note: Black regions in this image are transparent, white regions are opaque. Grey is semi-transparent.
  5. Next, with the same or a different material, follow Photoshop tutorial 1.20 to create a bump map for your image. Save this image to a Materials folder on your flash drive with “_bump” appended to the file name.
  6. Note: Black regions in this image are stick up (out) slightly, white regions are flush with the surface. Grey ranges are in between.
  7. Repeat steps 8 and/or 9 to create at least a second material (you need two materials in Part 3).

Part 3:

  1. Open the Rhinoceros file you created in Part 1.
  2. Follow V-Ray tutorial 8.6 to create and assign your two texture map materials to the two objects in your scene. Perform a rendering and save the resulting image (640 x 480 minimum). You will post this (and others) to the course website.
  3. Follow V-Ray tutorial 8.7 to add a transparency map to one or both materials. Perform a rendering and save the resulting image. You will post this image as well.
  4. Finally, follow V-Ray tutorial 8.8 to add a bump map to one or both of your materials. Perform a final rendering and save the resulting image. You will now post all three images to the course website.

Download .pdf of Exercise 11.2

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