diff --git a/src/engine/light.cc b/src/engine/light.cc
index 2f70e9b..e451e08 100644
--- a/src/engine/light.cc
+++ b/src/engine/light.cc
@@ -642,7 +642,8 @@ void initlights()
     loaddeferredlightshaders();
 }
 
-void lightreaching(const vec &target, vec &color, vec &dir, bool fast, extentity *t, float minambient)
+#if 0
+static void lightreaching(const vec &target, vec &color, vec &dir, bool fast = false, extentity *t = nullptr, float minambient = 0.4f)
 {
     if(fullbright && editmode)
     {
@@ -702,4 +703,4 @@ void lightreaching(const vec &target, vec &color, vec &dir, bool fast, extentity
     if(dir.iszero()) dir = vec(0, 0, 1);
     else dir.normalize();
 }
-
+#endif
diff --git a/src/engine/physics.hh b/src/engine/physics.hh
index e6665ca..6e968e2 100644
--- a/src/engine/physics.hh
+++ b/src/engine/physics.hh
@@ -35,4 +35,11 @@ void cleardynentcache();
 void updatedynentcache(physent *d);
 bool entinmap(dynent *d, bool avoidplayers = false);
 
+enum { RAY_BB = 1, RAY_POLY = 3, RAY_ALPHAPOLY = 7, RAY_ENTS = 9, RAY_CLIPMAT = 16, RAY_SKIPFIRST = 32, RAY_EDITMAT = 64, RAY_SHADOW = 128, RAY_PASS = 256, RAY_SKIPSKY = 512 };
+
+float raycube   (const vec &o, const vec &ray,     float radius = 0, int mode = RAY_CLIPMAT, int size = 0, extentity *t = 0);
+float raycubepos(const vec &o, const vec &ray, vec &hit, float radius = 0, int mode = RAY_CLIPMAT, int size = 0);
+float rayfloor  (const vec &o, vec &floor, int mode = 0, float radius = 0);
+bool  raycubelos(const vec &o, const vec &dest, vec &hitpos);
+
 #endif
diff --git a/src/engine/rendergl.cc b/src/engine/rendergl.cc
index 44c53b0..9166f35 100644
--- a/src/engine/rendergl.cc
+++ b/src/engine/rendergl.cc
@@ -1387,7 +1387,7 @@ FVAR(thirdpersonup, -25, 0, 25);
 FVAR(thirdpersonside, -25, 0, 25);
 physent *camera1 = NULL;
 static bool detachedcamera = false;
-bool isthirdperson() { return player!=camera1 || detachedcamera; }
+static bool isthirdperson() { return player!=camera1 || detachedcamera; }
 
 static void fixcamerarange()
 {
diff --git a/src/engine/renderparticles.cc b/src/engine/renderparticles.cc
index bc5c82a..4d097d0 100644
--- a/src/engine/renderparticles.cc
+++ b/src/engine/renderparticles.cc
@@ -6,6 +6,7 @@
 #include "octaedit.hh" // editmode
 #include "octarender.hh"
 #include "pvs.hh"
+#include "physics.hh" // ray*
 #include "rendergl.hh"
 #include "rendertext.hh"
 #include "renderva.hh"
diff --git a/src/shared/iengine.hh b/src/shared/iengine.hh
index 55c819f..90f7140 100644
--- a/src/shared/iengine.hh
+++ b/src/shared/iengine.hh
@@ -6,19 +6,6 @@ extern int elapsedtime;                 // elapsed frame time
 extern int totalmillis;                 // total elapsed time
 extern int gamespeed, paused;
 
-extern void lightent(extentity &e, float height = 8.0f);
-extern void lightreaching(const vec &target, vec &color, vec &dir, bool fast = false, extentity *e = 0, float minambient = 0.4f);
-
-enum { RAY_BB = 1, RAY_POLY = 3, RAY_ALPHAPOLY = 7, RAY_ENTS = 9, RAY_CLIPMAT = 16, RAY_SKIPFIRST = 32, RAY_EDITMAT = 64, RAY_SHADOW = 128, RAY_PASS = 256, RAY_SKIPSKY = 512 };
-
-extern float raycube   (const vec &o, const vec &ray,     float radius = 0, int mode = RAY_CLIPMAT, int size = 0, extentity *t = 0);
-extern float raycubepos(const vec &o, const vec &ray, vec &hit, float radius = 0, int mode = RAY_CLIPMAT, int size = 0);
-extern float rayfloor  (const vec &o, vec &floor, int mode = 0, float radius = 0);
-extern bool  raycubelos(const vec &o, const vec &dest, vec &hitpos);
-
-extern int thirdperson;
-extern bool isthirdperson();
-
 // command
 extern int variable(const char *name, int min, int cur, int max, int *storage, identfun fun, int flags);
 extern float fvariable(const char *name, float min, float cur, float max, float *storage, identfun fun, int flags);