--- a/Vis.cpp	Sat Mar 16 14:33:23 2013 +0200
+++ b/Vis.cpp	Sat Mar 16 21:57:32 2013 +0400
@@ -1743,10 +1743,10 @@
        if (Vis_static_stru_F91E10.object_pointers[0]->actual_z > pBillboardRenderList[v3].actual_z)
          return 1;
     }
-    else if ((double)(pViewport->uScreenX) <= *(float *)&v35 &&
-             (double)pViewport->uScreenZ >= *(float *)&v35 &&
-             (double)pViewport->uScreenY <= *(float *)&v36 &&
-             (double)pViewport->uScreenW >= *(float *)&v36)
+    else if ((double)(pViewport->uScreen_TL_X) <= *(float *)&v35 &&
+             (double)pViewport->uScreen_BR_X >= *(float *)&v35 &&
+             (double)pViewport->uScreen_TL_Y <= *(float *)&v36 &&
+             (double)pViewport->uScreen_BR_Y >= *(float *)&v36)
       return 1;
       v40 = 0;
       v10 = (int)&pRenderer->pBillboardRenderListD3D[uD3DBillboardIdx].pQuards[0].pos.y;
@@ -1757,13 +1757,13 @@
         v11 = *(float *)v10;
         v13 = *(float *)(v10 - 4);
         Vis_static_stru_F91E10.uNumPointers = 0;
-        if ( v13 >= (double)(pViewport->uScreenX))
+        if ( v13 >= (double)(pViewport->uScreen_TL_X))
         {
-          if ( v12 <= (double)pViewport->uScreenZ )
+          if ( v12 <= (double)pViewport->uScreen_BR_X )
           {
-            if ( v11 >= (double)pViewport->uScreenY )
+            if ( v11 >= (double)pViewport->uScreen_TL_Y )
             {
-              if ( v11 <= (double)pViewport->uScreenW )
+              if ( v11 <= (double)pViewport->uScreen_BR_Y )
               {
                 v14 = v11;
                 v15 = v12;
@@ -1811,10 +1811,10 @@
             v41 = v38;
           Vis_static_stru_F91E10.uNumPointers = 0;
           v23 = (v20 - v21) * 0.5;
-          if ( v23 < (double)(pViewport->uScreenX)
-            || v23 > (double)pViewport->uScreenZ
-            || (double)pViewport->uScreenY > v41
-            || (double)pViewport->uScreenW < v41
+          if ( v23 < (double)(pViewport->uScreen_TL_X)
+            || v23 > (double)pViewport->uScreen_BR_X
+            || (double)pViewport->uScreen_TL_Y > v41
+            || (double)pViewport->uScreen_BR_Y < v41
             || ((v25 = v23, CastPickRay(local_80, SLODWORD(v25), v41, fDepth), uCurrentlyLoadedLevelType != 1) ? 
              (PickOutdoorFaces_Mouse(fDepth, local_80, &Vis_static_stru_F91E10, &vis_face_filter, false)) : 
              (PickIndoorFaces_Mouse(fDepth, local_80, &Vis_static_stru_F91E10, &vis_face_filter)),