diff --git a/doc/sexblitter-perfection.png b/doc/sexblitter-perfection.png
new file mode 100644
index 000000000..ec287fd24
Binary files /dev/null and b/doc/sexblitter-perfection.png differ
diff --git a/doc/worldmap-sexblitter.png b/doc/worldmap-sexblitter.png
new file mode 100644
index 000000000..b86978861
Binary files /dev/null and b/doc/worldmap-sexblitter.png differ
diff --git a/tests/visual.cpp b/tests/visual.cpp
index c03883d37..57bc52f0b 100644
--- a/tests/visual.cpp
+++ b/tests/visual.cpp
@@ -465,7 +465,7 @@ TEST_CASE("Visual") {
       { 0xff605040, 0xffcccccc, 0xff605040, 0xff605040 },
       { 0xff605040, 0xff605040, 0xffcccccc, 0xff605040 },
       { 0xff605040, 0xff605040, 0xff605040, 0xffcccccc } };
-    const char* egcs[4] = { "▟", "▙", "▜", "▛" };
+    const char* egcs[] = { "▟", "▙", "▜", "▛" };
     for(int i = 0 ; i < 4 ; ++i){
       auto ncv = ncvisual_from_rgba(pixels[i], 2, 2 * sizeof(**pixels), 2);
       REQUIRE(nullptr != ncv);
@@ -508,7 +508,7 @@ TEST_CASE("Visual") {
       { 0xff605040, 0xffcccccc, 0xffcccccc, 0xff605040 },
       { 0xff605040, 0xffcccccc, 0xff605040, 0xffcccccc },
       { 0xff605040, 0xff605040, 0xffcccccc, 0xffcccccc } };
-    const char* egcs[6] = { "▀", "▌", "▚", "▚", "▌", "▀" };
+    const char* egcs[] = { "▀", "▌", "▚", "▚", "▌", "▀" };
     for(size_t i = 0 ; i < sizeof(egcs) / sizeof(*egcs) ; ++i){
       auto ncv = ncvisual_from_rgba(pixels[i], 2, 2 * sizeof(**pixels), 2);
       REQUIRE(nullptr != ncv);
@@ -556,7 +556,7 @@ TEST_CASE("Visual") {
       { 0xff605040, 0xffcccccc, 0xff444444, 0xff605040 },
       { 0xff605040, 0xffeeeeee, 0xff605040, 0xffcccccc },
       { 0xff605040, 0xff605040, 0xffeeeeee, 0xffcccccc } };
-    const char* egcs[6] = { "▟", "▜", "▟", "▙", "▌", "▀" };
+    const char* egcs[] = { "▟", "▜", "▟", "▙", "▌", "▀" };
     for(size_t i = 0 ; i < sizeof(egcs) / sizeof(*egcs) ; ++i){
       auto ncv = ncvisual_from_rgba(pixels[i], 2, 2 * sizeof(**pixels), 2);
       REQUIRE(nullptr != ncv);
@@ -594,5 +594,47 @@ TEST_CASE("Visual") {
       ncvisual_destroy(ncv);
     }
   }
+
+  // quadblitter with one pair plus two split
+  SUBCASE("QuadblitterAllDifferent") {
+    const uint32_t pixels[6][4] = {
+      { 0xffdddddd, 0xff000000, 0xff111111, 0xff222222 },
+      { 0xff000000, 0xff111111, 0xffdddddd, 0xff222222 },
+      { 0xff111111, 0xffdddddd, 0xff000000, 0xff222222 },
+      { 0xff000000, 0xffcccccc, 0xff222222, 0xffeeeeee },
+      { 0xff222222, 0xff000000, 0xffeeeeee, 0xffcccccc, } };
+    const char* egcs[] = { "▟", "▜", "▙", "▌", "▀" };
+    for(size_t i = 0 ; i < sizeof(egcs) / sizeof(*egcs) ; ++i){
+      auto ncv = ncvisual_from_rgba(pixels[i], 2, 2 * sizeof(**pixels), 2);
+      REQUIRE(nullptr != ncv);
+      struct ncvisual_options vopts = {
+        .n = nullptr,
+        .scaling = NCSCALE_NONE,
+        .y = 0,
+        .x = 0,
+        .begy = 0,
+        .begx = 0,
+        .leny = 0,
+        .lenx = 0,
+        .blitter = NCBLIT_2x2,
+        .flags = 0,
+      };
+      auto ncvp = ncvisual_render(nc_, ncv, &vopts);
+      REQUIRE(nullptr != ncvp);
+      int dimy, dimx;
+      ncplane_dim_yx(ncvp, &dimy, &dimx);
+      CHECK(1 == dimy);
+      CHECK(1 == dimx);
+      uint16_t stylemask;
+      uint64_t channels;
+      auto egc = ncplane_at_yx(ncvp, 0, 0, &stylemask, &channels);
+      CHECK(0 == strcmp(egcs[i], egc));
+      CHECK(0 == stylemask);
+      CHECK(0x111111 == channels_fg_rgb(channels));
+      CHECK(0xdddddd == channels_bg_rgb(channels));
+      free(egc);
+      ncvisual_destroy(ncv);
+    }
+  }
   CHECK(!notcurses_stop(nc_));
 }