diff --git a/src/Graphics/OpenGLContext/GLSL/glsl_CombinerProgramBuilder.cpp b/src/Graphics/OpenGLContext/GLSL/glsl_CombinerProgramBuilder.cpp
index dfd02433..2c152aaa 100644
--- a/src/Graphics/OpenGLContext/GLSL/glsl_CombinerProgramBuilder.cpp
+++ b/src/Graphics/OpenGLContext/GLSL/glsl_CombinerProgramBuilder.cpp
@@ -1684,24 +1684,27 @@ public:
 					"  if (magnify && (uTextureDetail == 1 || uTextureDetail == 3))			\n"
 					"      lod_frac = 1.0 - lod_frac;						\n"
 					"  if (uMaxTile == 0) {									\n"
-					"    if (uEnableLod != 0 && uTextureDetail < 2)	\n"
-					"      readtex1 = readtex0;								\n"
+					"    if (uEnableLod != 0) {								\n"
+					"      if (uTextureDetail < 2)	readtex1 = readtex0;	\n"
+					"      else if (!magnify) readtex0 = readtex1;			\n"
+					"    }													\n"
 					"    return lod_frac;									\n"
 					"  }													\n"
 					"  if (uEnableLod == 0) return lod_frac;				\n"
 					"														\n"
 					"  lod_tile = min(lod_tile, fMaxTile);					\n"
 					"  lowp float lod_tile_m1 = max(0.0, lod_tile - 1.0);	\n"
+					"  lowp float lod_tile_p1 = min(fMaxTile - 1.0, lod_tile + 1.0);	\n"
 					"  lowp vec4 lodT = texture2DLodEXT(uTex1, vTexCoord1, lod_tile);	\n"
 					"  lowp vec4 lodT_m1 = texture2DLodEXT(uTex1, vTexCoord1, lod_tile_m1);	\n"
-					"  lowp vec4 lodT_p1 = texture2DLodEXT(uTex1, vTexCoord1, lod_tile + 1.0);	\n"
+					"  lowp vec4 lodT_p1 = texture2DLodEXT(uTex1, vTexCoord1, lod_tile_p1);	\n"
 					"  if (lod_tile < 1.0) {								\n"
 					"    if (magnify) {									\n"
 					//     !sharpen && !detail
 					"      if (uTextureDetail == 0) readtex1 = readtex0;	\n"
 					"    } else {											\n"
 					//     detail
-					"      if (uTextureDetail > 1) {				\n"
+					"      if (uTextureDetail > 1) {						\n"
 					"        readtex0 = lodT;								\n"
 					"        readtex1 = lodT_p1;							\n"
 					"      }												\n"