Merge branch 'master' into fixes-17-get-triangle-index

Author: brendancol

README.md

@@ -4,7 +4,7 @@ Ray tracing using CUDA, accessible from Python.
 
 ![Crater Lake Viewshed Demo](examples/images/playground_demo.gif)
 
-*Real-time viewshed analysis with GPU-accelerated ray tracing. Green areas are visible from the observer position (white dot). Run `python examples/playground.py` to try it interactively.*
+*Real-time viewshed analysis with GPU-accelerated ray tracing. Green areas are visible from the observer position (blue dot). Run `python examples/playground.py` to try it interactively.*
 
 ## Prerequisites