Sample

A small part or quantity intended to show what the whole is like. (https://www.merriam-webster.com/dictionary/sample)

Topics
Point Clouds
3D meshes
Laserscanning vs Photogrammetry
Instructions

Instructions

1.3d Scanning and cleaning BLEND model

You can follow the instructions in the following video and the guidelines below to 3d scan your model, however it’s faster to jump on scanning directly using the app Polycam, the tutorial later can give you hints on how to cleanup your model.

Objective: You will scan 2 of your shapes developed in Blend and render them using Keyshot. The goal is to gain experience in both mobile scanning and using the Fab Lab’s 3D scanning equipment. You can scan all 4 forms if you want extra points.

STEPS

  1. Scanning Objects:
    • Scan 2 forms from your Blend models, you can scan all 4 shapes for extra points.
    • Mandatory: Use both phone scanning and Fab Lab scanning.
      • Phone Scanning (Foam or Clay or both)
        • Use one of the apps listed below to scan 1 to 2 objects.
        • Recommended app: Polycam (iOS) Follow instructions below.
        • Use photogrammetry mode (taking multiple pictures), not Lidar.
        • Ensure object masking and select full mode during upload.
      • Fab Lab Scanning (Voxels)
        • Use the laser scanner available in the Fab Lab to scan 1 to 2 additional objects.
        • Book a session online ahead of time to use the scanner, do it now.
        • At least one object must be scanned using the Fab Lab’s Voxel scanner.
  2. Exporting Files:
    • Export the scanned models from the apps in OBJ format.
    • Transfer the files to your computer for the next step.
  3. Rendering in Keyshot:
    • Import the OBJ files into Keyshot and render your models following the steps provided in class.
  4. Optional Cleaning and Optimization (if needed):
    • If your scanned models are too heavy or have unwanted details, use Meshmixer to:
      • Clean up the model.
      • Use the remesh and smooth functions to make the object lighter and easier to work with.
  5. By following these steps, you’ll learn how to scan real-world objects and integrate them into your 3D design workflow for rendering.
  6. POLYCAM INSTRUCTIONS
    • 1-Open Polycam and select Photo
    • 2-Select Auto Mode
    • 3-Click on capture button and go around the object, make sure you have a grid platform beneath your object, once you finish taking pictures, click capture button again to stop, flip your object and continue the capturing process, try to have at least 120/130 photos. 4-Click done when you finish
    • 5-Select Photogrammetry
    • 6-Select Full
    • 7-Select Object Masking
    • 8-Click on Upload and process and wait for it to be processed
    • 9-if you’re satissfied with the scan click on the Expoert button, else repeat steps 1 to 9. 10-Click on Obj, that’s the format you’re going to export and use in Keyshot and eventually on Rhino
    • 11-Click on Upgrade
    • 12-Click on Start Free Trial
    • 13-REMEMBER TO GO TO SUBSCRIPTIONS AND CANCEL YOUR FREE TRIAL SO YOU DON’T GET CHARGED , IMPORTANT!!!!!

2.Rendering BLEND model in Keyshot

Follow the tutorial at the following link to familiarize yourself with Keyshot and do the renders following the guidelines below.

  1. Open each of the two meshes seperatly in Keyshot and Render

Notes:

  1. Render object using diffuse materials.
  2. Render object using reflective materials.
  3. Render object using alpha channels.
  4. Render object using transparency.
  5. Render object using texture mapping.
  6. Render object using depth map (displacement) materials.

Submit your 3d models and renders at 23:59 one day before the next session.

Blog:

  • 5 photos of the ongoing scanning process (both including the laser scanner and your phone)
  • 6 rendered images (for each model, total 12) of the object on a white background 

Moodle:
Zipped folder named “yourname-Sample” containing: 

  • Folder “Rendering” with the pictures 3000×2000 (300 dpi) on a white background. File name  objectname_material.jpg size max 10 mb each

3.Import your models inside Unity

  1. Download and Install Unity3D  https://unity3d.com/
  2. You don’t need a license, you can use it for free
  3. Open Unity3D 
  4. Create a new project folder in your desired directory
  5. Import your scanned 3d models into unity, take a screenshot and upload it on your blog 

Bonus.

Additional Videos (watch at your own time, not directly related to the exercise)
ADAM episode1, ADAM behind the scenes , ADAM making of, Everything is a remix