wip(L6, side branch): screen-space far gate; no-op cutoff removed; cost within noise vs L4

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01ED33VnqepD4YY6gDAAA832

Standalone/Source/LinuxOffscreenCapture.cpp

@@ -341,11 +341,12 @@ int main(int argc,char** argv)
 {
     if(argc<3)
     {
-        std::fprintf(stderr,"Usage: %s scene.vfmesh output.png [--size=WIDTHxHEIGHT] [--fov-deg=90] [--yaw-deg=N] [--pitch-deg=N]\n",argv[0]);
+        std::fprintf(stderr,"Usage: %s scene.vfmesh output.png [--size=WIDTHxHEIGHT] [--fov-deg=90] [--camera-m=X,Y,Z] [--yaw-deg=N] [--pitch-deg=N]\n",argv[0]);
         return 2;
     }
     int Width=2560,Height=1440;double Fov=90.0;
     bool HasYaw=false,HasPitch=false;double Yaw=0.0,Pitch=0.0;
+    bool HasCamera=false;std::array<double,3> Camera{};
     for(int I=3;I<argc;++I)
     {
         const std::string_view Arg(argv[I]);
@@ -361,6 +362,14 @@ int main(int argc,char** argv)
             if(End==Value.c_str()||*End!='\0'||Fov<=1.0||Fov>=179.0)
             {std::fprintf(stderr,"Invalid horizontal FOV\n");return 2;}
         }
+        else if(Arg.starts_with("--camera-m="))
+        {
+            const std::string Value(Arg.substr(11));
+            if(std::sscanf(Value.c_str(),"%lf,%lf,%lf",&Camera[0],&Camera[1],&Camera[2])!=3
+                ||!std::isfinite(Camera[0])||!std::isfinite(Camera[1])||!std::isfinite(Camera[2]))
+            {std::fprintf(stderr,"Invalid camera position\n");return 2;}
+            HasCamera=true;
+        }
         else if(Arg.starts_with("--yaw-deg=")||Arg.starts_with("--pitch-deg="))
         {
             const bool IsYaw=Arg.starts_with("--yaw-deg=");
@@ -376,6 +385,7 @@ int main(int argc,char** argv)
     FScene Scene;std::string Error;
     if(!LoadScene(argv[1],Scene,Error))
     {std::fprintf(stderr,"[OffscreenCapture] FAIL: %s\n",Error.c_str());return 2;}
+    if(HasCamera)Scene.CameraMeters=Camera;
     if(HasYaw)Scene.YawDegrees=Yaw;
     if(HasPitch)Scene.PitchDegrees=Pitch;
     std::printf("[OffscreenScene] voxels_per_meter=%.6f camera_m=(%.3f,%.3f,%.3f) yaw=%.2f pitch=%.2f vertices=%zu triangles=%llu\n",