Got the movie working in the gallery

scripts/make-gallery.sh

@@ -2,7 +2,8 @@
 # Renders every example scene at lighting L0 and L1 into gallery/ (gitignored), as
 # <scene>-L0.png and <scene>-L1.png previews made with --pretty: white balanced, with a
 # tone curve, from exposures that keep the raw signal short of saturation. A scene whose
-# model, maps or kernels are missing is skipped with the reason. View the result with
+# model, maps or kernels are missing is skipped with the reason. Then the showcase
+# movie, gallery/movie.mp4 (resolved-movie, which needs ffmpeg). View the result with
 # scripts/serve-gallery.py.
 #
 # Needs: scripts/fetch-models.sh for the NASA models, scripts/fetch-earth.sh and
@@ -11,7 +12,7 @@
 set -e
 cd "$(dirname "$0")/.."
 
-cargo build --quiet --release -p resolved-cli
+cargo build --quiet --release -p resolved-cli -p resolved-showcase
 mkdir -p gallery
 
 made=0
@@ -32,3 +33,9 @@ for scene in examples/scenes/*.toml; do
     done
 done
 echo "$made images in gallery/, $skipped skipped"
+
+if error=$(./target/release/resolved-movie --out gallery/movie.mp4 2>&1); then
+    echo "gallery/movie.mp4"
+else
+    echo "skipped the movie: ${error#error: }"
+fi