diff --git a/config.yaml b/config.yaml
index d1c7d47..432480e 100644
--- a/config.yaml
+++ b/config.yaml
@@ -5,6 +5,8 @@ disableHugoGeneratorInject: true
 enableRobotsTXT: false
 
 params:
+  picturesBase: "/pictures"
+  thumbBase: "/pictures/thumb"
   sourceURL: "https://git.tobast.fr/tobast/georges"
   siteLicenseURL: "https://www.gnu.org/licenses/gpl-3.0.en.html"
   siteLicenseName: "GNU GPLv3"
@@ -40,6 +42,11 @@ module:
     target: i18n
   - source: archetypes
     target: archetypes
+  # Georges
+  - source: pictures/full
+    target: static/pictures
+  - source: pictures/thumb
+    target: static/pictures/thumb
   # Blueimp Gallery
   - source: contrib/blueimp-gallery/css
     target: static/blueimp/css
diff --git a/content/_index.md b/content/_index.md
index af5ac4e..00f9285 100644
--- a/content/_index.md
+++ b/content/_index.md
@@ -8,26 +8,26 @@ georgespics:
     osm: https://www.openstreetmap.org/#map=14/45.1612/5.9444
     date: 2021-06-27
     pics:
-    - path: img/georges/2021-06-pra1.jpg
-    - path: img/georges/2021-06-pra2.jpg
-    - path: img/georges/2021-06-pra3.jpg
-    - path: img/georges/2021-06-pra4.jpg
+    - path: 2021-06-pra1.jpg
+    - path: 2021-06-pra2.jpg
+    - path: 2021-06-pra3.jpg
+    - path: 2021-06-pra4.jpg
   - name: Pen-Bé, Bretagne
     osm: https://www.openstreetmap.org/#map=14/47.4205/-2.4575
     date: 2021-07-05
     pics:
-    - path: img/georges/2021-07-penbe1.jpg
-    - path: img/georges/2021-07-penbe2.jpg
+    - path: 2021-07-penbe1.jpg
+    - path: 2021-07-penbe2.jpg
   - name: Mourèze, Hérault
     osm: https://www.openstreetmap.org/#map=15/43.6191/3.3517
     date: 2021-07-27
     pics:
-    - path: img/georges/2021-07-moureze1.jpg
+    - path: 2021-07-moureze1.jpg
   - name: Dent de Crolles, Alpes
     osm: https://www.openstreetmap.org/#map=15/45.3105/5.8559
     date: 2021-11-13
     pics:
-    - path: img/georges/2021-11-crolles1.jpg
-    - path: img/georges/2021-11-crolles2.jpg
-    - path: img/georges/2021-11-crolles3.jpg
+    - path: 2021-11-crolles1.jpg
+    - path: 2021-11-crolles2.jpg
+    - path: 2021-11-crolles3.jpg
 ---
diff --git a/layouts/index.html b/layouts/index.html
index 6352416..a2ce8ca 100644
--- a/layouts/index.html
+++ b/layouts/index.html
@@ -59,8 +59,8 @@
 
     <div class="gallery">
       {{ range .pics }}
-      <a href="{{ .path }}">
-        <img src="{{ .path }}" />
+      <a href="{{ $.Site.Params.picturesBase }}/{{ .path }}">
+        <img src="{{ $.Site.Params.thumbBase }}/{{ .path }}" />
       </a>
       {{ end }}
     </div>
diff --git a/pictures/.gitignore b/pictures/.gitignore
new file mode 100644
index 0000000..bb48e1a
--- /dev/null
+++ b/pictures/.gitignore
@@ -0,0 +1 @@
+thumb
diff --git a/pictures/Makefile b/pictures/Makefile
new file mode 100644
index 0000000..d64cfeb
--- /dev/null
+++ b/pictures/Makefile
@@ -0,0 +1,18 @@
+FULLPICS = $(wildcard full/*.jpg)
+THUMBS = $(patsubst full/%.jpg,thumb/%.jpg,$(FULLPICS))
+
+THUMB_DIM = 400
+THUMB_ASPECT_RATIO = 1:1
+CONVERT_OPTIONS = -quality 75 -strip -interlace Plane +repage
+
+all: $(THUMBS)
+
+thumb/%.jpg: full/%.jpg
+	convert "$<" \
+		-resize '$(THUMB_DIM)x$(THUMB_DIM)^' \
+		-gravity "$$(./gravityof.sh "$<")" \
+		-crop "$(THUMB_ASPECT_RATIO)" \
+		$(CONVERT_OPTIONS) "$@"
+
+clean:
+	rm -f $(THUMBS)
diff --git a/static/img/georges/2021-06-pra1.jpg b/pictures/full/2021-06-pra1.jpg
similarity index 100%
rename from static/img/georges/2021-06-pra1.jpg
rename to pictures/full/2021-06-pra1.jpg
diff --git a/static/img/georges/2021-06-pra2.jpg b/pictures/full/2021-06-pra2.jpg
similarity index 100%
rename from static/img/georges/2021-06-pra2.jpg
rename to pictures/full/2021-06-pra2.jpg
diff --git a/static/img/georges/2021-06-pra3.jpg b/pictures/full/2021-06-pra3.jpg
similarity index 100%
rename from static/img/georges/2021-06-pra3.jpg
rename to pictures/full/2021-06-pra3.jpg
diff --git a/static/img/georges/2021-06-pra4.jpg b/pictures/full/2021-06-pra4.jpg
similarity index 100%
rename from static/img/georges/2021-06-pra4.jpg
rename to pictures/full/2021-06-pra4.jpg
diff --git a/static/img/georges/2021-07-moureze1.jpg b/pictures/full/2021-07-moureze1.jpg
similarity index 100%
rename from static/img/georges/2021-07-moureze1.jpg
rename to pictures/full/2021-07-moureze1.jpg
diff --git a/static/img/georges/2021-07-penbe1.jpg b/pictures/full/2021-07-penbe1.jpg
similarity index 100%
rename from static/img/georges/2021-07-penbe1.jpg
rename to pictures/full/2021-07-penbe1.jpg
diff --git a/static/img/georges/2021-07-penbe2.jpg b/pictures/full/2021-07-penbe2.jpg
similarity index 100%
rename from static/img/georges/2021-07-penbe2.jpg
rename to pictures/full/2021-07-penbe2.jpg
diff --git a/static/img/georges/2021-11-crolles1.jpg b/pictures/full/2021-11-crolles1.jpg
similarity index 100%
rename from static/img/georges/2021-11-crolles1.jpg
rename to pictures/full/2021-11-crolles1.jpg
diff --git a/static/img/georges/2021-11-crolles2.jpg b/pictures/full/2021-11-crolles2.jpg
similarity index 100%
rename from static/img/georges/2021-11-crolles2.jpg
rename to pictures/full/2021-11-crolles2.jpg
diff --git a/static/img/georges/2021-11-crolles3.jpg b/pictures/full/2021-11-crolles3.jpg
similarity index 100%
rename from static/img/georges/2021-11-crolles3.jpg
rename to pictures/full/2021-11-crolles3.jpg
diff --git a/pictures/gravity/2021-07-penbe1.gravity b/pictures/gravity/2021-07-penbe1.gravity
new file mode 100644
index 0000000..077fce6
--- /dev/null
+++ b/pictures/gravity/2021-07-penbe1.gravity
@@ -0,0 +1 @@
+South-West
diff --git a/pictures/gravityof.sh b/pictures/gravityof.sh
new file mode 100755
index 0000000..33fb184
--- /dev/null
+++ b/pictures/gravityof.sh
@@ -0,0 +1,8 @@
+#!/bin/bash
+
+path="$1"
+gravity_path="gravity/$(basename "$path" .jpg).gravity"
+if [ -f "$gravity_path" ]; then
+    read gravity < $gravity_path
+fi
+echo "${gravity:-center}"
diff --git a/pre-build.sh b/pre-build.sh
new file mode 100755
index 0000000..249048c
--- /dev/null
+++ b/pre-build.sh
@@ -0,0 +1,4 @@
+#!/bin/bash
+
+make -C pictures
+make -C scss