add masks need Alpha channel

[goodguy/cin-manual-latex.git] / parts / Windows.tex

diff --git a/parts/Windows.tex b/parts/Windows.tex
index 760a69601ed98a7a7e6b384bd7f2aed42368dbf4..1d618ac5e047743efda9d93743b3938a6c880db6 100644 (file)
--- a/parts/Windows.tex
+++ b/parts/Windows.tex
@@ -1100,6 +1100,8 @@ The compositing pipeline graph has a masking stage (figure~\ref{fig:temporary-02
 
 The Mask popup menu can be overwhelming upon first encounter.  However, if you follow the next
 few steps you can create a single simple mask without having to understand every possible parameter.
 
 The Mask popup menu can be overwhelming upon first encounter.  However, if you follow the next
 few steps you can create a single simple mask without having to understand every possible parameter.

+Be sure you are working in a Format that includes the Alpha channel, YUVA or RGBA, because you need
+to have transparency for masking to show or will end up with only a black area.

 \begin{enumerate}
     \item To define a mask, in the Compositor window click on the \textit{Edit mask} icon to get the popup Mask menu.  If the menu does not come up, click on the \textit{Show tool info}.
     \item  On the video, LMB click on the place where you want to start a mask.
 \begin{enumerate}
     \item To define a mask, in the Compositor window click on the \textit{Edit mask} icon to get the popup Mask menu.  If the menu does not come up, click on the \textit{Show tool info}.
     \item  On the video, LMB click on the place where you want to start a mask.