diff --git a/Collision.c b/Collision.c
index 9a06e50..ea0968f 100644
--- a/Collision.c
+++ b/Collision.c
@@ -44,7 +44,7 @@ vec3 collisionPlane(ray *lightray, plane *object) {
     if (vec3Product(lightray->direction, object->normal) >= 0) return (vec3){-10000000, -10000000, -10000000};
 
     r = vec3Product(object->normal, vec3Subtract(object->origin, lightray->origin)) * 1/(vec3Product(lightray->direction, object->normal));
-    if (r <= 1e-6) return (vec3){-10000000, -10000000, -10000000};
+    if (r <= 1e-9) return (vec3){-10000000, -10000000, -10000000};
 
     collisionPoint = vec3Add(lightray->origin, vec3Scale(lightray->direction, r));
     return collisionPoint;
diff --git a/interface.c b/interface.c
index 80fe812..d441eda 100644
--- a/interface.c
+++ b/interface.c
@@ -1,6 +1,14 @@
 //
 // Created by ary on 29.07.2026.
 //
+#include <stdio.h>
+#ifdef _WIN32
+    #include <windows.h>
+    #define SLEEP_SECONDS(s) Sleep((s) * 1000)
+#else
+    #include <unistd.h>
+    #define SLEEP_SECONDS(s) sleep(s)
+#endif
 
 #include "interface.h"
 #include "examples.h"
@@ -61,6 +69,21 @@ void *workerLoop(void *arg) {
     return NULL;
 }
 
+void* monitorProgress(void *arg) {
+    MonitorArgs *args = (MonitorArgs*)arg;
+
+    while (1){
+        pthread_mutex_lock(args->mutexKey);
+        int pixelId = *args->nextPixelId;
+        pthread_mutex_unlock(args->mutexKey);
+        if (pixelId >= args->pixelCount) break;
+        double progress = 100.0 * pixelId / args->pixelCount;
+        printf("progress: %lf%%\n", progress);
+        SLEEP_SECONDS(1);
+    }
+    return NULL;
+}
+
 void displaySzene(object objectList[], int objectCount, camera cam1, int width, int height, int channels, unsigned char **image) {
     const vec3 worldUp = (vec3){0, 1, 0};
     vec3 screenX = vec3Cross(worldUp, cam1.direction);
@@ -87,6 +110,8 @@ void displaySzene(object objectList[], int objectCount, camera cam1, int width,
         for (int i = 0; i < WORKTHREADSIZE; i++) {
             pthread_create(&(threadIdList[i]), NULL, workerLoop, args);
         }
+    pthread_t monitorThread;
+    pthread_create(&monitorThread, NULL, monitorProgress, (void*)(&(MonitorArgs){&args->nextPixelId, args->pixelCount, &args->mutexKey}));
 
 
         //renderPixel(i, objectList, objectCount, width, channels, &screenTopLeft, &vecPixelStepX, &vecPixelStepY, &cam1, image);
@@ -94,6 +119,7 @@ void displaySzene(object objectList[], int objectCount, camera cam1, int width,
     for (int i = 0; i < WORKTHREADSIZE; i++) {
         pthread_join(threadIdList[i], NULL);
     }
+    pthread_join(monitorThread, NULL);
     pthread_mutex_destroy(&args->mutexKey);
     free(threadIdList);
     free(args);
diff --git a/raytrace.c b/raytrace.c
index c2395c4..d51ba3a 100644
--- a/raytrace.c
+++ b/raytrace.c
@@ -31,8 +31,8 @@ RGBA getRayColor(RGBA colorList[], bool isLightList[]) {
         //return rayColor;
         firstLightHitIndex = lightBounces - 1;
         isLightList[firstLightHitIndex] = 1;
-        colorList[firstLightHitIndex] = (RGBA){GLOBALILLUMINATION,GLOBALILLUMINATION,GLOBALILLUMINATION,1};
-        //colorList[firstLightHitIndex] = (RGBA){0,0,0,1};
+        //colorList[firstLightHitIndex] = (RGBA){GLOBALILLUMINATION,GLOBALILLUMINATION,GLOBALILLUMINATION,1};
+        colorList[firstLightHitIndex] = (RGBA){0,0,0,1};
     }
         //pixel.r += spheresHitList[firstLightHitIndex]->color.r;
         //pixel.g += spheresHitList[firstLightHitIndex]->color.g;
diff --git a/structs.h b/structs.h
index 81d4310..f454517 100644
--- a/structs.h
+++ b/structs.h
@@ -72,4 +72,10 @@ typedef struct {
     int nextPixelId;
     pthread_mutex_t mutexKey;
     int pixelCount;
-} RenderArgs;
\ No newline at end of file
+} RenderArgs;
+
+typedef struct {
+    int *nextPixelId;
+    int pixelCount;
+    pthread_mutex_t *mutexKey;
+} MonitorArgs;
\ No newline at end of file
diff --git a/test.png b/test.png
index 998e51c..ecfeca5 100644
Binary files a/test.png and b/test.png differ