Computer Game Development and Design 2023/24 fall

Lab 9 - Blender modeling and texturing

In this lab, we are making a low poly tree and texture it using texture first approach. If you are more experienced with the blender you can make a different (more complex) model and submit a picture of your tree.

Why to learn Blender video from Computer Graphics course:

A very good Blender tutorial for beginners:

Lab video:

All hotkeys used in this lab are shown here:

Steps:

• Create a new blender project and add a cylinder with 5 sides.

• Extrude the tree upwards. After every extrusion, rotate and scale the last face a bit.

• You can cut longer segments in half with the loop cut tool Ctrl+R. (Useful if you need squared faces for extruding branches)

• Continue extruding sides of your trunk to make branches.

• Add branches until your tree is detailed enough.

• Open UV layout in another view and load the following texture:
  

• Assign Material to your mesh, and give it a texture
  • 

• Choose textured rendering mode to see the texture.

• Unwrap your mesh
  • Select an edge loop and unwrap it. Scale and place the selection to the corresponding color on your UV map.

• Continue unwrapping faces until they are all mapped to the texture.

• Create another object with a quad. Unwrap this quad to the branch.
• Duplicate the branch quad multiple times to cover the whole tree with branches.

Put your tree into Unity game engine

• Save the tree in *.blend file or export as *.fbx file
• Add this file to Unity
• Add the TreeTex texture file to unity
• Drag this object to the scene
• Create a new material using the TreeTex texture
• Use a two sided shader on your material for the leaves, you can find one from here: https://gist.github.com/cortvi/094f5233be6db0492b386cb494aa709a
• Add the material to your tree and configure the ambient lighting to make it well lit.

Submission

Make a screenshot about your finished tree in Unity and submit this picture. (PNG file only, Do not include the Blender files)