diff --git a/testmaps/q2_light_low_luxel_res2.map b/testmaps/q2_light_low_luxel_res2.map
new file mode 100644
index 00000000..1d9ca44c
--- /dev/null
+++ b/testmaps/q2_light_low_luxel_res2.map
@@ -0,0 +1,98 @@
+// Game: Quake 2
+// Format: Quake2 (Valve)
+// entity 0
+{
+"classname" "worldspawn"
+"_tb_textures" "textures/e1u1"
+"_minlightMottle" "0"
+"_minlight" "0"
+// brush 0
+{
+( 2960 1064 -656 ) ( 2960 1048 -656 ) ( 2960 1048 -672 ) e1u1/color1_2 [ 0 1 0 -8 ] [ 0 0 -1 0 ] 0 1 1
+( 2960 1048 -656 ) ( 2968 1048 -656 ) ( 2968 1048 -672 ) e1u1/color1_2 [ 1 0 0 0 ] [ 0 0 -1 0 ] 0 1 1
+( 2968 1048 -672 ) ( 2968 1064 -672 ) ( 2960 1064 -672 ) e1u1/color1_2 [ 1 0 0 0 ] [ 0 -1 0 8 ] 0 1 1
+( 2960 1064 -656 ) ( 2968 1064 -656 ) ( 2968 1048 -656 ) e1u1/color1_2 [ 1 0 0 0 ] [ 0 -1 0 8 ] 0 1 1
+( 2968 1064 -672 ) ( 2968 1064 -656 ) ( 2960 1064 -656 ) e1u1/color1_2 [ 1 0 0 0 ] [ 0 0 -1 0 ] 0 1 1
+( 2968 1048 -656 ) ( 2968 1064 -656 ) ( 2968 1064 -672 ) e1u1/color1_2 [ 0 1 0 -8 ] [ 0 0 -1 0 ] 0 1 1
+}
+// brush 1
+{
+( 2960 1064 -696 ) ( 2960 1048 -696 ) ( 2960 1048 -712 ) e1u1/color1_2 [ 0 1 0 -8 ] [ 0 0 -1 0 ] 0 1 1
+( 2960 1048 -696 ) ( 2968 1048 -696 ) ( 2968 1048 -712 ) e1u1/color1_2 [ 1 0 0 0 ] [ 0 0 -1 0 ] 0 1 1
+( 2968 1048 -712 ) ( 2968 1064 -712 ) ( 2960 1064 -712 ) e1u1/color1_2 [ 1 0 0 0 ] [ 0 -1 0 8 ] 0 1 1
+( 2960 1064 -696 ) ( 2968 1064 -696 ) ( 2968 1048 -696 ) e1u1/color1_2 [ 1 0 0 0 ] [ 0 -1 0 8 ] 0 1 1
+( 2968 1064 -712 ) ( 2968 1064 -696 ) ( 2960 1064 -696 ) e1u1/color1_2 [ 1 0 0 0 ] [ 0 0 -1 0 ] 0 1 1
+( 2968 1048 -696 ) ( 2968 1064 -696 ) ( 2968 1064 -712 ) e1u1/color1_2 [ 0 1 0 -8 ] [ 0 0 -1 0 ] 0 1 1
+}
+// brush 2
+{
+( 2964 1128 -544 ) ( 2964 980 -544 ) ( 2964 1128 -760 ) e1u1/color1_2 [ 0 1 0 0 ] [ 0 0 -1 0 ] 0 1 1
+( 2968 980 -760 ) ( 2964 980 -760 ) ( 2968 980 -544 ) e1u1/color1_2 [ 1 0 0 0 ] [ 0 0 -1 0 ] 0 1 1
+( 2968 1128 -760 ) ( 2964 1128 -760 ) ( 2968 980 -760 ) e1u1/color1_2 [ 1 0 0 0 ] [ 0 -1 0 0 ] 0 1 1
+( 2968 980 -544 ) ( 2964 980 -544 ) ( 2968 1128 -544 ) e1u1/color1_2 [ 1 0 0 0 ] [ 0 -1 0 0 ] 0 1 1
+( 2968 1128 -544 ) ( 2964 1128 -544 ) ( 2968 1128 -760 ) e1u1/color1_2 [ 1 0 0 0 ] [ 0 0 -1 0 ] 0 1 1
+( 2968 980 -544 ) ( 2968 1128 -544 ) ( 2968 980 -760 ) e1u1/color1_2 [ 0 1 0 0 ] [ 0 0 -1 0 ] 0 1 1
+}
+// brush 3
+{
+( 2744 980 -760 ) ( 2744 1128 -760 ) ( 2744 980 -544 ) e1u1/color1_2 [ 0 1 0 0 ] [ 0 0 -1 0 ] 0 1 1
+( 2744 980 -544 ) ( 2748 980 -544 ) ( 2744 980 -760 ) e1u1/color1_2 [ 1 0 0 0 ] [ 0 0 -1 0 ] 0 1 1
+( 2744 980 -760 ) ( 2748 980 -760 ) ( 2744 1128 -760 ) e1u1/color1_2 [ 1 0 0 0 ] [ 0 -1 0 0 ] 0 1 1
+( 2744 1128 -544 ) ( 2748 1128 -544 ) ( 2744 980 -544 ) e1u1/color1_2 [ 1 0 0 0 ] [ 0 -1 0 0 ] 0 1 1
+( 2744 1128 -760 ) ( 2748 1128 -760 ) ( 2744 1128 -544 ) e1u1/color1_2 [ 1 0 0 0 ] [ 0 0 -1 0 ] 0 1 1
+( 2748 980 -760 ) ( 2748 980 -544 ) ( 2748 1128 -760 ) e1u1/color1_2 [ 0 1 0 0 ] [ 0 0 -1 0 ] 0 1 1
+}
+// brush 4
+{
+( 2748 1128 -544 ) ( 2748 1124 -544 ) ( 2748 1128 -760 ) e1u1/color1_2 [ 0 1 0 0 ] [ 0 0 -1 0 ] 0 1 1
+( 2964 1124 -544 ) ( 2964 1124 -760 ) ( 2748 1124 -544 ) e1u1/color1_2 [ 1 0 0 0 ] [ 0 0 -1 0 ] 0 1 1
+( 2748 1128 -760 ) ( 2748 1124 -760 ) ( 2964 1128 -760 ) e1u1/color1_2 [ 1 0 0 0 ] [ 0 -1 0 0 ] 0 1 1
+( 2964 1128 -544 ) ( 2964 1124 -544 ) ( 2748 1128 -544 ) e1u1/color1_2 [ 1 0 0 0 ] [ 0 -1 0 0 ] 0 1 1
+( 2964 1128 -544 ) ( 2748 1128 -544 ) ( 2964 1128 -760 ) e1u1/color1_2 [ 1 0 0 0 ] [ 0 0 -1 0 ] 0 1 1
+( 2964 1128 -760 ) ( 2964 1124 -760 ) ( 2964 1128 -544 ) e1u1/color1_2 [ 0 1 0 0 ] [ 0 0 -1 0 ] 0 1 1
+}
+// brush 5
+{
+( 2748 980 -760 ) ( 2748 984 -760 ) ( 2748 980 -544 ) e1u1/color1_2 [ 0 1 0 0 ] [ 0 0 -1 0 ] 0 1 1
+( 2964 980 -760 ) ( 2748 980 -760 ) ( 2964 980 -544 ) e1u1/color1_2 [ 1 0 0 0 ] [ 0 0 -1 0 ] 0 1 1
+( 2964 980 -760 ) ( 2964 984 -760 ) ( 2748 980 -760 ) e1u1/color1_2 [ 1 0 0 0 ] [ 0 -1 0 0 ] 0 1 1
+( 2748 980 -544 ) ( 2748 984 -544 ) ( 2964 980 -544 ) e1u1/color1_2 [ 1 0 0 0 ] [ 0 -1 0 0 ] 0 1 1
+( 2748 984 -760 ) ( 2964 984 -760 ) ( 2748 984 -544 ) e1u1/color1_2 [ 1 0 0 0 ] [ 0 0 -1 0 ] 0 1 1
+( 2964 980 -544 ) ( 2964 984 -544 ) ( 2964 980 -760 ) e1u1/color1_2 [ 0 1 0 0 ] [ 0 0 -1 0 ] 0 1 1
+}
+// brush 6
+{
+( 2748 984 -544 ) ( 2748 984 -548 ) ( 2748 1124 -544 ) e1u1/color1_2 [ 0 1 0 0 ] [ 0 0 -1 0 ] 0 1 1
+( 2964 984 -544 ) ( 2964 984 -548 ) ( 2748 984 -544 ) e1u1/color1_2 [ 1 0 0 0 ] [ 0 0 -1 0 ] 0 1 1
+( 2964 1124 -548 ) ( 2748 1124 -548 ) ( 2964 984 -548 ) e1u1/color1_2 [ 1 0 0 0 ] [ 0 -1 0 0 ] 0 1 1
+( 2964 1124 -544 ) ( 2964 984 -544 ) ( 2748 1124 -544 ) e1u1/color1_2 [ 1 0 0 0 ] [ 0 -1 0 0 ] 0 1 1
+( 2748 1124 -544 ) ( 2748 1124 -548 ) ( 2964 1124 -544 ) e1u1/color1_2 [ 1 0 0 0 ] [ 0 0 -1 0 ] 0 1 1
+( 2964 1124 -544 ) ( 2964 1124 -548 ) ( 2964 984 -544 ) e1u1/color1_2 [ 0 1 0 0 ] [ 0 0 -1 0 ] 0 1 1
+}
+// brush 7
+{
+( 2748 1124 -760 ) ( 2748 1124 -756 ) ( 2748 984 -760 ) e1u1/color1_2 [ 0 1 0 0 ] [ 0 0 -1 0 ] 0 1 1
+( 2748 984 -760 ) ( 2748 984 -756 ) ( 2964 984 -760 ) e1u1/color1_2 [ 1 0 0 0 ] [ 0 0 -1 0 ] 0 1 1
+( 2748 1124 -760 ) ( 2748 984 -760 ) ( 2964 1124 -760 ) e1u1/color1_2 [ 1 0 0 0 ] [ 0 -1 0 0 ] 0 1 1
+( 2748 984 -756 ) ( 2748 1124 -756 ) ( 2964 984 -756 ) e1u1/color1_2 [ 1 0 0 0 ] [ 0 -1 0 0 ] 0 1 1
+( 2964 1124 -760 ) ( 2964 1124 -756 ) ( 2748 1124 -760 ) e1u1/color1_2 [ 1 0 0 0 ] [ 0 0 -1 0 ] 0 1 1
+( 2964 984 -760 ) ( 2964 984 -756 ) ( 2964 1124 -760 ) e1u1/color1_2 [ 0 1 0 0 ] [ 0 0 -1 0 ] 0 1 1
+}
+}
+// entity 1
+{
+"classname" "info_player_start"
+"origin" "2888 1058 -712"
+}
+// entity 2
+{
+"classname" "light"
+"origin" "2936 1044 -702"
+"light" "100"
+}
+// entity 3
+{
+"classname" "light"
+"origin" "2936 1044 -666"
+"light" "100"
+}
diff --git a/tests/test_ltface.cc b/tests/test_ltface.cc
index b9191428..699621a0 100644
--- a/tests/test_ltface.cc
+++ b/tests/test_ltface.cc
@@ -260,10 +260,13 @@ static void CheckFaceLuxelAtPoint(const mbsp_t *bsp, const dmodelh2_t *model, co
     }
 
     const auto coord = extents.worldToLMCoord(point);
+    const auto int_coord = qvec2i(round(coord[0]), round(coord[1]));
 
-    const qvec3b sample = LM_Sample(bsp, lit, extents, offset, qvec2i(coord));
+    const qvec3b sample = LM_Sample(bsp, lit, extents, offset, int_coord);
     INFO("world point: ", point);
     INFO("lm coord: ", coord[0], ", ", coord[1]);
+    INFO("lm int_coord: ", int_coord[0], ", ", int_coord[1]);
+    INFO("face num: ", Face_GetNum(bsp, face));
 
     CHECK(sample == expected_color);
 }
@@ -517,7 +520,7 @@ TEST_CASE("light channel mask / dirt interaction")
     CheckFaceLuxelAtPoint(&bsp, &bsp.dmodels[0], {26, 26, 26}, {1432, 1480, 944});
 
     INFO("worldspawn not receiving dirt from func_wall on different channel");
-    CheckFaceLuxelAtPoint(&bsp, &bsp.dmodels[0], {62, 62, 62}, {1212, 1272, 1014});
+    CheckFaceLuxelAtPoint(&bsp, &bsp.dmodels[0], {60, 60, 60}, {1212, 1272, 1014});
 
     INFO("func_wall on different channel not receiving dirt from worldspawn");
     CheckFaceLuxelAtPoint(&bsp, &bsp.dmodels[1], {64, 64, 64}, {1216, 1266, 1014});
@@ -667,4 +670,15 @@ TEST_CASE("q2_light_low_luxel_res")
         INFO("sloped cube");
         CheckFaceLuxelAtPoint(&bsp, &bsp.dmodels[0], {232, 185, 0}, {2164, 712, -968}, {0, 1, 0}, nullptr, &bspx);
     }
+}
+
+TEST_CASE("q2_light_low_luxel_res2" * doctest::may_fail())
+{
+    auto [bsp, bspx] = QbspVisLight_Q2(
+        "q2_light_low_luxel_res2.map", {"-world_units_per_luxel", "32", "-debugface", "2964", "1020", "-696"});
+
+    INFO("should be a smooth transition across these points");
+    CheckFaceLuxelAtPoint(&bsp, &bsp.dmodels[0], {49, 49, 49}, {2964, 1046, -694}, {-1, 0, 0}, nullptr, &bspx);
+    CheckFaceLuxelAtPoint(&bsp, &bsp.dmodels[0], {25, 25, 25}, {2964, 1046, -706}, {-1, 0, 0}, nullptr, &bspx);
+    CheckFaceLuxelAtPoint(&bsp, &bsp.dmodels[0], {1, 1, 1}, {2964, 1046, -716}, {-1, 0, 0}, nullptr, &bspx);
 }
\ No newline at end of file