diff --git a/pipi/stock.c b/pipi/stock.c
index 2ae4863..a25ebe2 100644
--- a/pipi/stock.c
+++ b/pipi/stock.c
@@ -77,7 +77,7 @@ pipi_image_t *pipi_load_stock(char const *name)
     if(!strncmp(name, "random", 6))
     {
         unsigned int ctx = 1;
-        int x, y, w, h;
+        int x, y, t, w, h;
 
         w = atoi(name + 6);
         name = strchr(name + 6, 'x');
@@ -88,21 +88,26 @@ pipi_image_t *pipi_load_stock(char const *name)
             return NULL;
 
         ret = pipi_new(w, h);
-        pix = pipi_getpixels(ret, PIPI_PIXELS_Y_F);
+        pix = pipi_getpixels(ret, PIPI_PIXELS_RGBA_F);
         data = (float *)pix->pixels;
 
         for(y = 0; y < h; y++)
             for(x = 0; x < w; x++)
             {
-                long hi, lo;
+                for(t = 0; t < 3; t++)
+                {
+                    long hi, lo;
 
-                hi = ctx / 12773L;
-                lo = ctx % 12773L;
-                ctx = 16807L * lo - 2836L * hi;
-                if(ctx <= 0)
-                    ctx += 0x7fffffffL;
+                    hi = ctx / 12773L;
+                    lo = ctx % 12773L;
+                    ctx = 16807L * lo - 2836L * hi;
+                    if(ctx <= 0)
+                        ctx += 0x7fffffffL;
 
-                data[y * w + x] = (double)((ctx % 65536) / 65535.);
+                    data[4 * (y * w + x) + t]
+                        = (double)((ctx % 65536) / 65535.);
+                }
+                data[4 * (y * w + x) + 3] = 1.0;
             }
 
         return ret;