diff --git a/engine/art/shaderlib/light.glsl b/engine/art/shaderlib/light.glsl
index dcdecc0..cf9f66a 100644
--- a/engine/art/shaderlib/light.glsl
+++ b/engine/art/shaderlib/light.glsl
@@ -72,26 +72,6 @@ vec3 shading_light(light_t l, material_t m) {
         return vec3(0,0,0);
     }
 
-#ifdef SHADING_PHONG
-    vec3 n = normalize(v_normal_ws);
-
-    float diffuse = max(dot(n, lightDir), 0.0);
-
-    vec3 halfVec = normalize(lightDir + u_cam_dir);
-    float specular = pow(max(dot(n, halfVec), 0.0), l.power);
-
-    return (attenuation*l.ambient + diffuse*attenuation*l.diffuse + specular*attenuation*l.specular);
-#endif
-#ifdef SHADING_VERTEXLIT
-    vec3 n = normalize(v_normal_ws);
-
-    float diffuse = max(dot(n, lightDir), 0.0);
-
-    vec3 halfVec = normalize(lightDir + u_cam_dir);
-    float specular = pow(max(dot(n, halfVec), 0.0), l.power);
-
-    return (attenuation*l.ambient + diffuse*attenuation*l.diffuse + specular*attenuation*l.specular);
-#endif
 #ifdef SHADING_PBR
     vec3 radiance = l.diffuse * BOOST_LIGHTING;
     vec3 V = normalize( v_to_camera );
@@ -118,6 +98,15 @@ vec3 shading_light(light_t l, material_t m) {
     float NdotL = max( 0., dot( N, L ) );
 
     return ( kD * ( m.albedo / PI ) + specular ) * radiance * NdotL * attenuation;
+#else
+    vec3 n = normalize(v_normal_ws);
+
+    float diffuse = max(dot(n, lightDir), 0.0);
+
+    vec3 halfVec = normalize(lightDir + u_cam_dir);
+    float specular = pow(max(dot(n, halfVec), 0.0), l.power);
+
+    return (attenuation*l.ambient + diffuse*attenuation*l.diffuse + specular*attenuation*l.specular);
 #endif
 }
 
diff --git a/engine/joint/v4k.h b/engine/joint/v4k.h
index 6a7ee79..886c86a 100644
--- a/engine/joint/v4k.h
+++ b/engine/joint/v4k.h
@@ -386336,6 +386336,16 @@ void model_shading_custom(model_t *m, int shading, const char *vs, const char *f
         fs = vfs_read("shaders/fs_32_4_model.glsl");
     }
 
+    /* needs to match SHADING_MODE */
+    const char *shading_defines[] = {
+        "SHADING_NONE",
+        "SHADING_PHONG",
+        "SHADING_VERTEXLIT",
+        "SHADING_PBR",
+    };
+
+    const char *shading_define = shading_defines[shading];
+
     // rebind shader
     // @fixme: app crashes rn
     // glUseProgram(0);
@@ -386343,7 +386353,7 @@ void model_shading_custom(model_t *m, int shading, const char *vs, const char *f
     const char *symbols[] = { "{{include-shadowmap}}", vfs_read("shaders/fs_0_0_shadowmap_lit.glsl") }; // #define RIM
     int shaderprog = shader(strlerp(1,symbols,vs), strlerp(1,symbols,fs), //fs,
         "att_position,att_texcoord,att_normal,att_tangent,att_instanced_matrix,,,,att_indexes,att_weights,att_vertexindex,att_color,att_bitangent,att_texcoord2","fragColor",
-        va("%s,%s,%s", defines ? defines : "NO_CUSTOM_DEFINES", shading == SHADING_PBR ? "SHADING_PBR" : shading == SHADING_VERTEXLIT ? "SHADING_VERTEXLIT" : "SHADING_PHONG", (flags&MODEL_RIMLIGHT)?"RIM":""));
+        va("%s,%s,%s", defines ? defines : "NO_CUSTOM_DEFINES", shading_define, (flags&MODEL_RIMLIGHT)?"RIM":""));
     m->program = shaderprog;
     model_init_uniforms(m);
 }
diff --git a/engine/split/v4k_render.c b/engine/split/v4k_render.c
index e7e2f4b..2a6c2e3 100644
--- a/engine/split/v4k_render.c
+++ b/engine/split/v4k_render.c
@@ -4679,6 +4679,16 @@ void model_shading_custom(model_t *m, int shading, const char *vs, const char *f
         fs = vfs_read("shaders/fs_32_4_model.glsl");
     }
 
+    /* needs to match SHADING_MODE */
+    const char *shading_defines[] = {
+        "SHADING_NONE",
+        "SHADING_PHONG",
+        "SHADING_VERTEXLIT",
+        "SHADING_PBR",
+    };
+
+    const char *shading_define = shading_defines[shading];
+
     // rebind shader
     // @fixme: app crashes rn
     // glUseProgram(0);
@@ -4686,7 +4696,7 @@ void model_shading_custom(model_t *m, int shading, const char *vs, const char *f
     const char *symbols[] = { "{{include-shadowmap}}", vfs_read("shaders/fs_0_0_shadowmap_lit.glsl") }; // #define RIM
     int shaderprog = shader(strlerp(1,symbols,vs), strlerp(1,symbols,fs), //fs,
         "att_position,att_texcoord,att_normal,att_tangent,att_instanced_matrix,,,,att_indexes,att_weights,att_vertexindex,att_color,att_bitangent,att_texcoord2","fragColor",
-        va("%s,%s,%s", defines ? defines : "NO_CUSTOM_DEFINES", shading == SHADING_PBR ? "SHADING_PBR" : shading == SHADING_VERTEXLIT ? "SHADING_VERTEXLIT" : "SHADING_PHONG", (flags&MODEL_RIMLIGHT)?"RIM":""));
+        va("%s,%s,%s", defines ? defines : "NO_CUSTOM_DEFINES", shading_define, (flags&MODEL_RIMLIGHT)?"RIM":""));
     m->program = shaderprog;
     model_init_uniforms(m);
 }
diff --git a/engine/v4k.c b/engine/v4k.c
index 235916a..bb062aa 100644
--- a/engine/v4k.c
+++ b/engine/v4k.c
@@ -21478,6 +21478,16 @@ void model_shading_custom(model_t *m, int shading, const char *vs, const char *f
         fs = vfs_read("shaders/fs_32_4_model.glsl");
     }
 
+    /* needs to match SHADING_MODE */
+    const char *shading_defines[] = {
+        "SHADING_NONE",
+        "SHADING_PHONG",
+        "SHADING_VERTEXLIT",
+        "SHADING_PBR",
+    };
+
+    const char *shading_define = shading_defines[shading];
+
     // rebind shader
     // @fixme: app crashes rn
     // glUseProgram(0);
@@ -21485,7 +21495,7 @@ void model_shading_custom(model_t *m, int shading, const char *vs, const char *f
     const char *symbols[] = { "{{include-shadowmap}}", vfs_read("shaders/fs_0_0_shadowmap_lit.glsl") }; // #define RIM
     int shaderprog = shader(strlerp(1,symbols,vs), strlerp(1,symbols,fs), //fs,
         "att_position,att_texcoord,att_normal,att_tangent,att_instanced_matrix,,,,att_indexes,att_weights,att_vertexindex,att_color,att_bitangent,att_texcoord2","fragColor",
-        va("%s,%s,%s", defines ? defines : "NO_CUSTOM_DEFINES", shading == SHADING_PBR ? "SHADING_PBR" : shading == SHADING_VERTEXLIT ? "SHADING_VERTEXLIT" : "SHADING_PHONG", (flags&MODEL_RIMLIGHT)?"RIM":""));
+        va("%s,%s,%s", defines ? defines : "NO_CUSTOM_DEFINES", shading_define, (flags&MODEL_RIMLIGHT)?"RIM":""));
     m->program = shaderprog;
     model_init_uniforms(m);
 }