Update on Overleaf.

handout/handout.tex

@@ -76,13 +76,13 @@ Differentiable ray tracing is the task of calculating the gradient of this proce
 
 \section{Problems with differentiability}
 The geometry term $g(x,x^\prime)$ in equation \ref{eq:rendering_integral} is the main problem when it comes do differentiating the rendering integral. This term is 1 iff $x$ is visible from $x^\prime$, 0 otherwise.
-\begin{figure}
+\begin{figure}[h]
     \centering
     \include{handout/diagrams/diagramm_occlusion}
-    \caption{Caption}
-    \label{fig:enter-label}
+    \caption{A simple occlusion scenario. An infinitesimal change in ray angle $d\omega$ is sufficient to determine whether the wall is visible or not.}
+    \label{fig:occlusion_rays}
 \end{figure}
-
+As illustrated in figure \ref{fig:occlusion_rays} an infinitesimal angle change $d\omega$ can lead to the blocker obstructing the wall or the wall being visible. The geometry term is thus a Heaviside step function which when differentiated yields a dirac delta functional.
 % BIBLIOGRAPHY
 \nocite{*} % List all entries of the .bib file, even those not cited in the main body
 \printbibliography