diff --git a/video/out/opengl/nnedi3.c b/video/out/opengl/nnedi3.c
index f757324608..04131078e3 100644
--- a/video/out/opengl/nnedi3.c
+++ b/video/out/opengl/nnedi3.c
@@ -81,7 +81,7 @@ const float* get_nnedi3_weights(const struct nnedi3_opts *conf, int *size)
 }
 
 void pass_nnedi3(GL *gl, struct gl_shader_cache *sc, int planes, int tex_num,
-                 int step, const struct nnedi3_opts *conf,
+                 int step, float tex_mul, const struct nnedi3_opts *conf,
                  struct gl_transform *transform)
 {
     assert(0 <= step && step < 2);
@@ -115,23 +115,23 @@ void pass_nnedi3(GL *gl, struct gl_shader_cache *sc, int planes, int tex_num,
         GLSLH(#pragma optionNV(fastprecision on))
     }
 
-    GLSLHF("float nnedi3(sampler2D tex, vec2 pos, vec2 tex_size, int plane) {\n");
+    GLSLHF("float nnedi3(sampler2D tex, vec2 pos, vec2 tex_size, int plane, float tex_mul) {\n");
 
     if (step == 0) {
         *transform = (struct gl_transform){{{1.0,0.0}, {0.0,2.0}}, {0.0,-0.5}};
 
         GLSLH(if (fract(pos.y * tex_size.y) < 0.5)
-                  return texture(tex, pos + vec2(0, 0.25) / tex_size)[plane];)
+                  return texture(tex, pos + vec2(0, 0.25) / tex_size)[plane] * tex_mul;)
         GLSLHF("#define GET(i, j) "
-               "(texture(tex, pos+vec2((i)-(%f),(j)-(%f)+0.25)/tex_size)[plane])\n",
+               "(texture(tex, pos+vec2((i)-(%f),(j)-(%f)+0.25)/tex_size)[plane]*tex_mul)\n",
                width / 2.0 - 1, (height - 1) / 2.0);
     } else {
         *transform = (struct gl_transform){{{2.0,0.0}, {0.0,1.0}}, {-0.5,0.0}};
 
         GLSLH(if (fract(pos.x * tex_size.x) < 0.5)
-                  return texture(tex, pos + vec2(0.25, 0) / tex_size)[plane];)
+                  return texture(tex, pos + vec2(0.25, 0) / tex_size)[plane] * tex_mul;)
         GLSLHF("#define GET(i, j) "
-               "(texture(tex, pos+vec2((j)-(%f)+0.25,(i)-(%f))/tex_size)[plane])\n",
+               "(texture(tex, pos+vec2((j)-(%f)+0.25,(i)-(%f))/tex_size)[plane]*tex_mul)\n",
                (height - 1) / 2.0, width / 2.0 - 1);
     }
 
@@ -213,7 +213,7 @@ void pass_nnedi3(GL *gl, struct gl_shader_cache *sc, int planes, int tex_num,
     GLSL(vec4 color = vec4(1.0);)
 
     for (int i = 0; i < planes; i++) {
-        GLSLF("color[%d] = nnedi3(texture%d, texcoord%d, texture_size%d, %d);\n",
-              i, tex_num, tex_num, tex_num, i);
+        GLSLF("color[%d] = nnedi3(texture%d, texcoord%d, texture_size%d, %d, %f);\n",
+              i, tex_num, tex_num, tex_num, i, tex_mul);
     }
 }
diff --git a/video/out/opengl/nnedi3.h b/video/out/opengl/nnedi3.h
index 8498b9de7a..be69f34c78 100644
--- a/video/out/opengl/nnedi3.h
+++ b/video/out/opengl/nnedi3.h
@@ -41,7 +41,7 @@ extern const struct m_sub_options nnedi3_conf;
 const float* get_nnedi3_weights(const struct nnedi3_opts *conf, int *size);
 
 void pass_nnedi3(GL *gl, struct gl_shader_cache *sc, int planes, int tex_num,
-                 int step, const struct nnedi3_opts *conf,
+                 int step, float tex_mul, const struct nnedi3_opts *conf,
                  struct gl_transform *transform);
 
 #endif
diff --git a/video/out/opengl/superxbr.c b/video/out/opengl/superxbr.c
index a88c058a38..c5b40fe36f 100644
--- a/video/out/opengl/superxbr.c
+++ b/video/out/opengl/superxbr.c
@@ -77,7 +77,7 @@ const struct m_sub_options superxbr_conf = {
 */
 
 void pass_superxbr(struct gl_shader_cache *sc, int planes, int tex_num,
-                   int step, const struct superxbr_opts *conf,
+                   int step, float tex_mul, const struct superxbr_opts *conf,
                    struct gl_transform *transform)
 {
     assert(0 <= step && step < 2);
@@ -99,7 +99,7 @@ void pass_superxbr(struct gl_shader_cache *sc, int planes, int tex_num,
         GLSLHF("#define weight1 (%f*1.29633/10.0)\n", conf->sharpness);
         GLSLHF("#define weight2 (%f*1.75068/10.0/2.0)\n", conf->sharpness);
 
-        GLSLH(#define Get(x, y) (texture(tex, pos + (vec2(x, y) - vec2(0.25, 0.25)) / tex_size)[plane]))
+        GLSLH(#define Get(x, y) (texture(tex, pos + (vec2(x, y) - vec2(0.25, 0.25)) / tex_size)[plane] * tex_mul))
     } else {
         *transform = (struct gl_transform){{{1.0,0.0}, {0.0,1.0}}, {0.0,0.0}};
 
@@ -113,7 +113,7 @@ void pass_superxbr(struct gl_shader_cache *sc, int planes, int tex_num,
         GLSLHF("#define weight1 (%f*1.75068/10.0)\n", conf->sharpness);
         GLSLHF("#define weight2 (%f*1.29633/10.0/2.0)\n", conf->sharpness);
 
-        GLSLH(#define Get(x, y) (texture(tex, pos + (vec2((x) + (y) - 1, (y) - (x))) / tex_size)[plane]))
+        GLSLH(#define Get(x, y) (texture(tex, pos + (vec2((x) + (y) - 1, (y) - (x))) / tex_size)[plane] * tex_mul))
     }
     GLSLH(float df(float A, float B)
           {
@@ -140,7 +140,7 @@ void pass_superxbr(struct gl_shader_cache *sc, int planes, int tex_num,
                       wp3*(df(i1,e2)+df(i3,e4)+df(e1,i2)+df(e3,i4)));
           })
 
-    GLSLHF("float superxbr(sampler2D tex, vec2 pos, vec2 tex_size, int plane) {\n");
+    GLSLHF("float superxbr(sampler2D tex, vec2 pos, vec2 tex_size, int plane, float tex_mul) {\n");
 
     if (step == 0) {
         GLSLH(vec2 dir = fract(pos * tex_size) - 0.5;)
@@ -152,11 +152,11 @@ void pass_superxbr(struct gl_shader_cache *sc, int planes, int tex_num,
                   return 0.0;)
 
         GLSLH(if (dir.x < 0 || dir.y < 0 || dist.x < 1 || dist.y < 1)
-                  return texture(tex, pos - dir / tex_size)[plane];)
+                  return texture(tex, pos - dir / tex_size)[plane] * tex_mul;)
     } else {
         GLSLH(vec2 dir = fract(pos * tex_size / 2) - 0.5;)
         GLSLH(if (dir.x * dir.y > 0)
-                  return texture(tex, pos)[plane];)
+                  return texture(tex, pos)[plane] * tex_mul;)
     }
 
     GLSLH(float P0 = Get(-1,-1);
@@ -228,7 +228,7 @@ void pass_superxbr(struct gl_shader_cache *sc, int planes, int tex_num,
     GLSL(vec4 color = vec4(1.0);)
 
     for (int i = 0; i < planes; i++) {
-        GLSLF("color[%d] = superxbr(texture%d, texcoord%d, texture_size%d, %d);\n",
-              i, tex_num, tex_num, tex_num, i);
+        GLSLF("color[%d] = superxbr(texture%d, texcoord%d, texture_size%d, %d, %f);\n",
+              i, tex_num, tex_num, tex_num, i, tex_mul);
     }
 }
diff --git a/video/out/opengl/superxbr.h b/video/out/opengl/superxbr.h
index 46f15fd269..08cec82839 100644
--- a/video/out/opengl/superxbr.h
+++ b/video/out/opengl/superxbr.h
@@ -30,7 +30,7 @@ extern const struct superxbr_opts superxbr_opts_def;
 extern const struct m_sub_options superxbr_conf;
 
 void pass_superxbr(struct gl_shader_cache *sc, int planes, int tex_num,
-                   int step, const struct superxbr_opts *conf,
+                   int step, float tex_mul, const struct superxbr_opts *conf,
                    struct gl_transform *transform);
 
 #endif
diff --git a/video/out/opengl/video.c b/video/out/opengl/video.c
index 14ad3dee79..5ed831bfe5 100644
--- a/video/out/opengl/video.c
+++ b/video/out/opengl/video.c
@@ -1210,20 +1210,17 @@ static void pass_prescale(struct gl_video *p, int src_tex_num, int dst_tex_num,
             switch(p->opts.prescale) {
             case 1:
                 pass_superxbr(p->sc, planes, tex_num, step,
-                              p->opts.superxbr_opts, &transform);
+                              tex_mul, p->opts.superxbr_opts, &transform);
                 break;
             case 2:
                 pass_nnedi3(p->gl, p->sc, planes, tex_num, step,
-                            p->opts.nnedi3_opts, &transform);
+                            tex_mul, p->opts.nnedi3_opts, &transform);
                 break;
             default:
                 abort();
             }
 
-            if (tex_mul != 1.0) {
-                GLSLF("color *= %f;\n", tex_mul);
-                tex_mul = 1.0;
-            }
+            tex_mul = 1.0;
 
             gl_transform_trans(transform, offset);