diff --git a/src/filter.c b/src/filter.c
index 8fb4a0d..c5143f3 100644
--- a/src/filter.c
+++ b/src/filter.c
@@ -28,17 +28,17 @@
 #include "toilet.h"
 #include "filter.h"
 
-static void filter_crop(cucul_canvas_t *);
-static void filter_gay(cucul_canvas_t *);
-static void filter_metal(cucul_canvas_t *);
-static void filter_flip(cucul_canvas_t *);
-static void filter_flop(cucul_canvas_t *);
-static void filter_rotate(cucul_canvas_t *);
+static void filter_crop(context_t *);
+static void filter_gay(context_t *);
+static void filter_metal(context_t *);
+static void filter_flip(context_t *);
+static void filter_flop(context_t *);
+static void filter_rotate(context_t *);
 
 struct
 {
     char const *name;
-    void (*function)(cucul_canvas_t *);
+    void (*function)(context_t *);
 }
 const lookup[] =
 {
@@ -92,7 +92,7 @@ int filter_do(context_t *cx)
     unsigned int i;
 
     for(i = 0; i < cx->nfilters; i++)
-        cx->filters[i](cx->torender);
+        cx->filters[i](cx);
 
     return 0;
 }
@@ -104,20 +104,20 @@ int filter_end(context_t *cx)
     return 0;
 }
 
-static void filter_crop(cucul_canvas_t *cv)
+static void filter_crop(context_t *cx)
 {
     unsigned int x, y, w, h;
     unsigned int xmin, xmax, ymin, ymax;
 
-    xmin = w = cucul_get_canvas_width(cv);
+    xmin = w = cucul_get_canvas_width(cx->torender);
     xmax = 0;
-    ymin = h = cucul_get_canvas_height(cv);
+    ymin = h = cucul_get_canvas_height(cx->torender);
     ymax = 0;
 
     for(y = 0; y < h; y++)
         for(x = 0; x < w; x++)
     {
-        unsigned long int ch = cucul_getchar(cv, x, y);
+        unsigned long int ch = cucul_getchar(cx->torender, x, y);
         if(ch != (unsigned char)' ')
         {
             if(x < xmin)
@@ -134,11 +134,11 @@ static void filter_crop(cucul_canvas_t *cv)
     if(xmax < xmin || ymax < ymin)
         return;
 
-    cucul_set_canvas_boundaries(cv, xmin, ymin,
+    cucul_set_canvas_boundaries(cx->torender, xmin, ymin,
                                 xmax - xmin + 1, ymax - ymin + 1);
 }
 
-static void filter_metal(cucul_canvas_t *cv)
+static void filter_metal(context_t *cx)
 {
     static unsigned char const palette[] =
     {
@@ -150,25 +150,25 @@ static void filter_metal(cucul_canvas_t *cv)
 
     unsigned int x, y, w, h;
 
-    w = cucul_get_canvas_width(cv);
-    h = cucul_get_canvas_height(cv);
+    w = cucul_get_canvas_width(cx->torender);
+    h = cucul_get_canvas_height(cx->torender);
 
     for(y = 0; y < h; y++)
         for(x = 0; x < w; x++)
     {
-        unsigned long int ch = cucul_getchar(cv, x, y);
+        unsigned long int ch = cucul_getchar(cx->torender, x, y);
         int i;
 
         if(ch == (unsigned char)' ')
             continue;
 
-        i = y * 4 / h;
-        cucul_set_color(cv, palette[i], CUCUL_COLOR_TRANSPARENT);
-        cucul_putchar(cv, x, y, ch);
+        i = ((cx->lines + y + x / 8) / 2) % 4;
+        cucul_set_color(cx->torender, palette[i], CUCUL_COLOR_TRANSPARENT);
+        cucul_putchar(cx->torender, x, y, ch);
     }
 }
 
-static void filter_gay(cucul_canvas_t *cv)
+static void filter_gay(context_t *cx)
 {
     static unsigned char const rainbow[] =
     {
@@ -181,34 +181,34 @@ static void filter_gay(cucul_canvas_t *cv)
     };
     unsigned int x, y, w, h;
 
-    w = cucul_get_canvas_width(cv);
-    h = cucul_get_canvas_height(cv);
+    w = cucul_get_canvas_width(cx->torender);
+    h = cucul_get_canvas_height(cx->torender);
 
     for(y = 0; y < h; y++)
         for(x = 0; x < w; x++)
     {
-        unsigned long int ch = cucul_getchar(cv, x, y);
+        unsigned long int ch = cucul_getchar(cx->torender, x, y);
         if(ch != (unsigned char)' ')
         {
-            cucul_set_color(cv, rainbow[(x / 2 + y) % 6],
+            cucul_set_color(cx->torender, rainbow[(x / 2 + y + cx->lines) % 6],
                                 CUCUL_COLOR_TRANSPARENT);
-            cucul_putchar(cv, x, y, ch);
+            cucul_putchar(cx->torender, x, y, ch);
         }
     }
 }
 
-static void filter_flip(cucul_canvas_t *cv)
+static void filter_flip(context_t *cx)
 {
-    cucul_flip(cv);
+    cucul_flip(cx->torender);
 }
 
-static void filter_flop(cucul_canvas_t *cv)
+static void filter_flop(context_t *cx)
 {
-    cucul_flop(cv);
+    cucul_flop(cx->torender);
 }
 
-static void filter_rotate(cucul_canvas_t *cv)
+static void filter_rotate(context_t *cx)
 {
-    cucul_rotate(cv);
+    cucul_rotate(cx->torender);
 }
 
diff --git a/src/render.c b/src/render.c
index 8763099..4aa53f2 100644
--- a/src/render.c
+++ b/src/render.c
@@ -29,6 +29,8 @@
 #include "render.h"
 #include "filter.h"
 
+static int render_flush(context_t *);
+
 int render_init(context_t *cx)
 {
     cx->x = cx->y = 0;
@@ -66,7 +68,7 @@ int render_stdin(context_t *cx)
         i = 0;
 
         if(ch == '\n')
-            render_line(cx);
+            render_flush(cx);
     }
 
     return 0;
@@ -91,27 +93,7 @@ int render_list(context_t *cx, unsigned int argc, char *argv[])
         }
     }
 
-    render_line(cx);
-
-    return 0;
-}
-
-int render_line(context_t *cx)
-{
-    cucul_buffer_t *buffer;
-
-    /* Flush current line */
-    cx->flush(cx);
-
-    /* Apply optional effects to our string */
-    filter_do(cx);
-
-    /* Output line */
-    buffer = cucul_export_canvas(cx->torender, cx->export);
-    fwrite(cucul_get_buffer_data(buffer),
-           cucul_get_buffer_size(buffer), 1, stdout);
-    cucul_free_buffer(buffer);
-    cucul_free_canvas(cx->torender);
+    render_flush(cx);
 
     return 0;
 }
@@ -124,3 +106,27 @@ int render_end(context_t *cx)
     return 0;
 }
 
+/* XXX: Following functions are local */
+
+static int render_flush(context_t *cx)
+{
+    cucul_buffer_t *buffer;
+
+    /* Flush current line */
+    cx->flush(cx);
+
+    /* Apply optional effects to our string */
+    filter_do(cx);
+
+    cx->lines += cucul_get_canvas_height(cx->torender);
+
+    /* Output line */
+    buffer = cucul_export_canvas(cx->torender, cx->export);
+    fwrite(cucul_get_buffer_data(buffer),
+           cucul_get_buffer_size(buffer), 1, stdout);
+    cucul_free_buffer(buffer);
+    cucul_free_canvas(cx->torender);
+
+    return 0;
+}
+
diff --git a/src/render.h b/src/render.h
index ec311ec..a4e028b 100644
--- a/src/render.h
+++ b/src/render.h
@@ -22,6 +22,5 @@ extern int init_figlet(context_t *);
 extern int render_init(context_t *);
 extern int render_stdin(context_t *);
 extern int render_list(context_t *, unsigned int, char *[]);
-extern int render_line(context_t *);
 extern int render_end(context_t *);
 
diff --git a/src/toilet.h b/src/toilet.h
index ea1c3c3..1128462 100644
--- a/src/toilet.h
+++ b/src/toilet.h
@@ -47,7 +47,7 @@ struct toilet_context
     unsigned int *lookup;
 
     /* Render filters */
-    void (**filters)(cucul_canvas_t *);
+    void (**filters)(struct toilet_context *);
     unsigned int nfilters;
 };