diff --git a/demos/06-material.c b/demos/06-material.c
index 5283354..9f06faf 100644
--- a/demos/06-material.c
+++ b/demos/06-material.c
@@ -37,8 +37,8 @@ int main() {
     // load model
     model_t m1 = model("suzanne.obj", MODEL_NO_ANIMATIONS);
     model_t m2 = model("suzanne.obj", MODEL_NO_ANIMATIONS|MODEL_MATCAPS);
-    model_t m3 = model("damagedhelmet.gltf", MODEL_NO_ANIMATIONS|MODEL_PBR);
-    // model_t m3 = model("Scutum_low.fbx", MODEL_NO_ANIMATIONS|MODEL_PBR);
+    // model_t m3 = model("damagedhelmet.gltf", MODEL_NO_ANIMATIONS|MODEL_PBR);
+    model_t m3 = model("Scutum_low.fbx", MODEL_NO_ANIMATIONS|MODEL_PBR);
     // model_t m4 = model("avp/scene.gltf", MODEL_NO_ANIMATIONS|MODEL_PBR);
     // model_t m3 = model("Cerberus_LP.FBX", MODEL_NO_ANIMATIONS|MODEL_PBR);
 
diff --git a/demos/art/fx/fxAces.fs b/demos/art/fx/fxAces.fs
new file mode 100644
index 0000000..e43bd3c
--- /dev/null
+++ b/demos/art/fx/fxAces.fs
@@ -0,0 +1,16 @@
+out vec4 color;
+
+void main(void) {
+    vec2 uv = TEXCOORD.st;
+    vec3 src = texture2D(iChannel0, uv).rgb;
+    vec3 x = src;
+
+    // aces film (CC0, src: https://knarkowicz.wordpress.com/2016/01/06/aces-filmic-tone-mapping-curve/)
+    float a = 2.51f;
+    float b = 0.03f;
+    float c = 2.43f;
+    float d = 0.59f;
+    float e = 0.14f;
+    src = clamp((x*(a*x+b))/(x*(c*x+d)+e), 0.0, 1.0);
+    color = vec4(src, 1.0);
+}
diff --git a/engine/art/shaders/fs_32_4_model.glsl b/engine/art/shaders/fs_32_4_model.glsl
index 4f3445c..234a407 100644
--- a/engine/art/shaders/fs_32_4_model.glsl
+++ b/engine/art/shaders/fs_32_4_model.glsl
@@ -140,7 +140,7 @@ uniform ColorMap map_emissive;  uniform sampler2D map_emissive_tex;
 #define sample_colormap(ColorMap_, uv_) \
     (ColorMap_.has_tex ? texture( ColorMap_##_tex, uv_ ) : ColorMap_.color)
 
-uniform float skysphere_rotation=-90;
+uniform float skysphere_rotation=0;
 uniform float skysphere_mip_count;
 uniform float exposure=1;
 uniform uint frame_count;
@@ -703,7 +703,7 @@ void main(void)
     color = clamp((x*(a*x+b))/(x*(c*x+d)+e), 0.0, 1.0);
     // gamma correction
 #endif
-    color = pow( color, vec3(1. / 2.2) );
+    // color = pow( color, vec3(1. / 2.2) );
 
     // Technically this alpha may be too transparent, if there is a lot of reflected light we wouldn't
     // see the background, maybe we can approximate it well enough by adding a fresnel term
diff --git a/engine/joint/v4k.h b/engine/joint/v4k.h
index f1271d2..14f5413 100644
--- a/engine/joint/v4k.h
+++ b/engine/joint/v4k.h
@@ -372608,8 +372608,8 @@ bool colormap( colormap_t *cm, const char *texture_name, bool load_as_srgb ) {
     }
 
     int srgb = load_as_srgb ? TEXTURE_SRGB : 0;
-    int hdr = strendi(texture_name, ".hdr") ? TEXTURE_FLOAT : 0;
-    texture_t t = texture_compressed(texture_name, TEXTURE_RGBA | TEXTURE_LINEAR | TEXTURE_MIPMAPS | TEXTURE_REPEAT | hdr | srgb);
+    int hdr = strendi(texture_name, ".hdr") ? TEXTURE_FLOAT|TEXTURE_RGBA : 0;
+    texture_t t = texture_compressed(texture_name, TEXTURE_LINEAR | TEXTURE_MIPMAPS | TEXTURE_REPEAT | hdr | srgb);
 
     if( t.id == texture_checker().id ) {
         cm->texture = NULL;
@@ -373279,7 +373279,7 @@ static char* strcpy_safe(char *d, const char *s) {
 static
 void model_load_pbr_layer(material_layer_t *layer, const char *texname, bool load_as_srgb) {
     strcpy_safe(layer->texname, texname);
-    colormap(&layer->map, texname, load_as_srgb);
+    colormap(&layer->map, texname, false);
 }
 
 static
diff --git a/engine/split/v4k_render.c b/engine/split/v4k_render.c
index 3c70ed7..82db3d1 100644
--- a/engine/split/v4k_render.c
+++ b/engine/split/v4k_render.c
@@ -2590,8 +2590,8 @@ bool colormap( colormap_t *cm, const char *texture_name, bool load_as_srgb ) {
     }
 
     int srgb = load_as_srgb ? TEXTURE_SRGB : 0;
-    int hdr = strendi(texture_name, ".hdr") ? TEXTURE_FLOAT : 0;
-    texture_t t = texture_compressed(texture_name, TEXTURE_RGBA | TEXTURE_LINEAR | TEXTURE_MIPMAPS | TEXTURE_REPEAT | hdr | srgb);
+    int hdr = strendi(texture_name, ".hdr") ? TEXTURE_FLOAT|TEXTURE_RGBA : 0;
+    texture_t t = texture_compressed(texture_name, TEXTURE_LINEAR | TEXTURE_MIPMAPS | TEXTURE_REPEAT | hdr | srgb);
 
     if( t.id == texture_checker().id ) {
         cm->texture = NULL;
@@ -3261,7 +3261,7 @@ static char* strcpy_safe(char *d, const char *s) {
 static
 void model_load_pbr_layer(material_layer_t *layer, const char *texname, bool load_as_srgb) {
     strcpy_safe(layer->texname, texname);
-    colormap(&layer->map, texname, load_as_srgb);
+    colormap(&layer->map, texname, false);
 }
 
 static
diff --git a/engine/v4k.c b/engine/v4k.c
index cf9baa3..0ad3568 100644
--- a/engine/v4k.c
+++ b/engine/v4k.c
@@ -19762,8 +19762,8 @@ bool colormap( colormap_t *cm, const char *texture_name, bool load_as_srgb ) {
     }
 
     int srgb = load_as_srgb ? TEXTURE_SRGB : 0;
-    int hdr = strendi(texture_name, ".hdr") ? TEXTURE_FLOAT : 0;
-    texture_t t = texture_compressed(texture_name, TEXTURE_RGBA | TEXTURE_LINEAR | TEXTURE_MIPMAPS | TEXTURE_REPEAT | hdr | srgb);
+    int hdr = strendi(texture_name, ".hdr") ? TEXTURE_FLOAT|TEXTURE_RGBA : 0;
+    texture_t t = texture_compressed(texture_name, TEXTURE_LINEAR | TEXTURE_MIPMAPS | TEXTURE_REPEAT | hdr | srgb);
 
     if( t.id == texture_checker().id ) {
         cm->texture = NULL;
@@ -20433,7 +20433,7 @@ static char* strcpy_safe(char *d, const char *s) {
 static
 void model_load_pbr_layer(material_layer_t *layer, const char *texname, bool load_as_srgb) {
     strcpy_safe(layer->texname, texname);
-    colormap(&layer->map, texname, load_as_srgb);
+    colormap(&layer->map, texname, false);
 }
 
 static