add megascans

topics/02_passive/index.md

@@ -22,6 +22,9 @@ Photogrammetry was first documented by the Prussian architect [Albrecht Meydenba
 
 <img src="images/data_model_photogrammetry.png" alt="Data Model of Photogrammetry">
 
+<img src="images/colorized_point_cloud_manufacturing_facility.jpg" alt="Colorized Point Cloud">
+
+
 
 Unlike other scanning methods that require precise orbital plans or specialized equipment, photogrammetry can be achieved simply by flying a drone in a circular pattern and capturing multiple photos. Utilizing the location data from the drone, one can construct detailed models like the example shown here: A typical medium resolution aerial photogrammetry scan of a barn.
 With 50-100 images a reasonably accurate model can be produced. Such models are often used in surveying and restoration projects from the scale of hand helf objects to cities. This accessibility makes photogrammetry an attractive option for various applications, with results that can be sufficiently accurate depending on the specific requirements.
@@ -108,6 +111,8 @@ As the apps multiply, scanned objects become more widely available for both art
 [Scan the World](https://www.myminifactory.com/scantheworld/)<br>
 [Quixel Megascans](https://quixel.com/megascans)
 
+<img src="images/quixel_megascans.jpg" alt="Quixel Megascans Asset Library">
+