diff --git a/haloo3d b/haloo3d
index a30aea9..6472c00 160000
--- a/haloo3d
+++ b/haloo3d
@@ -1 +1 @@
-Subproject commit a30aea9dac005602b64d9591f906407bccbd88e2
+Subproject commit 6472c00bda48e7fc29508913e08c90cb801ceb25
diff --git a/terrain.c b/terrain.c
index d195c9e..3ddb906 100644
--- a/terrain.c
+++ b/terrain.c
@@ -70,8 +70,9 @@
 #define LANDCOL 0xF6D2  // 0xF4E1
 #define FLANDCOL 0xF260 // 0xF3A0 // 0xF4E1
 #define UWLANDCOL 0xF026
-#define SEACOL 0xF28D // 0xF26C
-#define SKYCOL 0xFA7F // 0xF77F
+#define SEACOL 0xF28D  // 0xF26C
+#define SKYCOL 0xF96E  // 0xF77F
+#define SKYCOL2 0xFFAF // 0xF77F
 #define CLOUDCOL 0xFFFF
 #define TREECOL 0xF070
 #define TREETRUNKCOL 0xF950
@@ -79,7 +80,7 @@
 #define YELLOWFLOWERCOL 0xFEE0
 #define TOWERCOL 0xF111
 #define LIGHTCOL 0xFF00
-#define TOWERLOW 0.758 // small changes to this make a huge difference
+#define TOWERLOW 0.755 // small changes to this make a huge difference
 #define TOWERLIGHTMINSIZE (CHUNKSCALE * 0.1)
 #define TOWERLIGHTMAXSIZE (CHUNKSCALE * 0.5)
 #define TOWERLIGHTMINTRANS 0
@@ -453,6 +454,9 @@ void sys_rendercontext(ecs_rendercontext *erc, ecs_placement *p, tecs **ecs) {
   if (rc->windowclear & 0xF000) {
     haloo3d_fb_clear(&rc->window, rc->windowclear);
   }
+  if (rc->backtex) {
+    haloo3d_fb_fill_raw(&rc->window, rc->backtex, 0);
+  }
   // Precalc stuff for later object rendering
   rc->precalc_halfwidth = rc->window.width * H3DVF(0.5);
   rc->precalc_halfheight = rc->window.height * H3DVF(0.5);
@@ -712,6 +716,58 @@ ecs_eid setup_sea(tecs *ecs, render_context *ctx, ecs_placement *playerpos,
   return seaid;
 }
 
+void draw_gradient(haloo3d_fb *buf, uint16_t topcol, uint16_t botcol,
+                   int height) {
+  // Precalc an array indicating the bands of color.
+  int row[64]; // not sure how many bands there can be but...
+  uint16_t col[64];
+  int bandscount = 1;
+  row[0] = 0;
+  col[0] = topcol;
+  uint8_t dither[4];
+  for (int y = 1; y < height; y++) {
+    uint16_t thiscol =
+        haloo3d_col_lerp(topcol, botcol, (float)y / (height - 1));
+    if (thiscol != col[bandscount - 1]) {
+      row[bandscount] = y;
+      col[bandscount] = thiscol;
+      bandscount++;
+    }
+  }
+  for (int band = 0; band < bandscount - 1; band++) {
+    for (int r = row[band]; r < row[band + 1]; r++) {
+      haloo3d_getdither4x4((float)(r - row[band]) / (row[band + 1] - row[band]),
+                           dither);
+      uint8_t df = dither[r & 3];
+      for (int b = 0; b < 8; b++) {
+        haloo3d_fb_set(buf, b, r, (df & 1) ? col[band + 1] : col[band]);
+        df >>= 1;
+        // haloo3d_col_lerp(topcol, botcol, (float)y / (height - 1)));
+      }
+      uint16_t *bufstart = buf->buffer + r * buf->width;
+      // Then, a repeated growing copy to minimize copies? IDK
+      for (int size = 8; size < buf->width; size <<= 1) {
+        memcpy(bufstart + size, bufstart,
+               sizeof(uint16_t) * MIN(size, buf->width - size));
+      }
+    }
+  }
+  // int band = 0;
+  // for (int y = 0; y < height; y++) {
+  //   // Calculate dither between the two colors
+  //   // Fill the initial section
+  //   haloo3d_fb_set(buf, 0, y,
+  //                  haloo3d_col_lerp(topcol, botcol, (float)y / (height -
+  //                  1)));
+  //   uint16_t *bufstart = buf->buffer + y * buf->width;
+  //   // Then, a repeated growing copy to minimize copies? IDK
+  //   for (int size = 1; size < buf->width; size <<= 1) {
+  //     memcpy(bufstart + size, bufstart,
+  //            sizeof(uint16_t) * MIN(size, buf->width - size));
+  //   }
+  // }
+}
+
 // ---------------------------------------------------
 //   MAIN FUNCTION
 // ---------------------------------------------------
@@ -744,8 +800,16 @@ int main() { // int argc, char **argv) {
   haloo3d_easytimer_init(&drawtimer, AVGWEIGHT);
   haloo3d_easytimer_init(&sdltimer, AVGWEIGHT);
 
+  haloo3d_fb skygrad;
+  haloo3d_fb_init_tex(&skygrad, 1 << (int)ceil(log2(WIDTH)),
+                      1 << (int)ceil(log2(HEIGHT)));
+  haloo3d_fb_clear(&skygrad, SKYCOL2);
+  draw_gradient(&skygrad, SKYCOL, SKYCOL2, HEIGHT / 2);
+  eprintf("Sky texture size: %dx%d\n", skygrad.width, skygrad.height);
+
   render_context context;
-  context.windowclear = SKYCOL;
+  context.backtex = &skygrad;
+  context.windowclear = 0; // SKYCOL;
   context.nearclip = INIT_NEARCLIP;
   context.farclip = INIT_FARCLIP;
   context.fov = INIT_FOV;
diff --git a/terrain_ecstypes.h b/terrain_ecstypes.h
index e2e2b29..2e6b2c0 100644
--- a/terrain_ecstypes.h
+++ b/terrain_ecstypes.h
@@ -21,6 +21,7 @@ typedef struct {
   mfloat_t farclip;
   // NOTE: aspect ratio calculated from window
   haloo3d_fb window;
+  haloo3d_fb *backtex;
   // Baseline render settings. Some of these settings will be applied to
   // each object associated with this context
   haloo3d_trirender rendersettings;