REVIEWED: `rlLoadTeexture()`, max mipmap levels to use #5400

src/rlgl.h

@@ -3384,10 +3384,12 @@ unsigned int rlLoadTexture(const void *data, int width, int height, int format,
 #if defined(GRAPHICS_API_OPENGL_33)
     if (mipmapCount > 1)
     {
-        // Activate Trilinear filtering if mipmaps are available
+        // Activate trilinear filtering if mipmaps are available
         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
-        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, mipmapCount); // Required for user-defined mip count
+        
+        // Define thee maximum number of mipmap levels to be used, 0 is default texture size
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, mipmapCount - 1);
     }
 #endif