diff --git a/engine/client/ref_common.c b/engine/client/ref_common.c
index 71cbd87c..a736f51f 100644
--- a/engine/client/ref_common.c
+++ b/engine/client/ref_common.c
@@ -278,9 +278,6 @@ static ref_api_t gEngfuncs =
 	Mod_PointInLeaf,
 	Mod_CreatePolygonsForHull,
 
-	R_StudioSlerpBones,
-	R_StudioCalcBoneQuaternion,
-	R_StudioCalcBonePosition,
 	R_StudioGetAnim,
 	pfnStudioEvent,
 
diff --git a/engine/common/mod_local.h b/engine/common/mod_local.h
index 16c29531..3dcf50dc 100644
--- a/engine/common/mod_local.h
+++ b/engine/common/mod_local.h
@@ -182,9 +182,6 @@ qboolean Mod_GetStudioBounds( const char *name, vec3_t mins, vec3_t maxs );
 void Mod_StudioGetAttachment( const edict_t *e, int iAttachment, float *org, float *ang );
 void Mod_GetBonePosition( const edict_t *e, int iBone, float *org, float *ang );
 hull_t *Mod_HullForStudio( model_t *m, float frame, int seq, vec3_t ang, vec3_t org, vec3_t size, byte *pcnt, byte *pbl, int *hitboxes, edict_t *ed );
-void R_StudioSlerpBones( int numbones, vec4_t q1[], float pos1[][3], vec4_t q2[], float pos2[][3], float s );
-void R_StudioCalcBoneQuaternion( int frame, float s, mstudiobone_t *pbone, mstudioanim_t *panim, float *adj, vec4_t q );
-void R_StudioCalcBonePosition( int frame, float s, mstudiobone_t *pbone, mstudioanim_t *panim, vec3_t adj, vec3_t pos );
 void *R_StudioGetAnim( studiohdr_t *m_pStudioHeader, model_t *m_pSubModel, mstudioseqdesc_t *pseqdesc );
 void Mod_StudioComputeBounds( void *buffer, vec3_t mins, vec3_t maxs, qboolean ignore_sequences );
 int Mod_HitgroupForStudioHull( int index );
diff --git a/engine/common/mod_studio.c b/engine/common/mod_studio.c
index 56f241ae..251c9a0c 100644
--- a/engine/common/mod_studio.c
+++ b/engine/common/mod_studio.c
@@ -397,196 +397,6 @@ static void Mod_StudioCalcRotations( int boneused[], int numbones, const byte *p
 	if( pseqdesc->motiontype & STUDIO_Z ) pos[pseqdesc->motionbone][2] = 0.0f;
 }
 
-/*
-====================
-StudioCalcBoneQuaternion
-
-====================
-*/
-void R_StudioCalcBoneQuaternion( int frame, float s, mstudiobone_t *pbone, mstudioanim_t *panim, float *adj, vec4_t q )
-{
-	vec3_t	angles1;
-	vec3_t	angles2;
-	int	j, k;
-
-	for( j = 0; j < 3; j++ )
-	{
-		if( !panim || panim->offset[j+3] == 0 )
-		{
-			angles2[j] = angles1[j] = pbone->value[j+3]; // default;
-		}
-		else
-		{
-			mstudioanimvalue_t *panimvalue = (mstudioanimvalue_t *)((byte *)panim + panim->offset[j+3]);
-
-			k = frame;
-
-			// debug
-			if( panimvalue->num.total < panimvalue->num.valid )
-				k = 0;
-
-			// find span of values that includes the frame we want
-			while( panimvalue->num.total <= k )
-			{
-				k -= panimvalue->num.total;
-				panimvalue += panimvalue->num.valid + 1;
-
-				// debug
-				if( panimvalue->num.total < panimvalue->num.valid )
-					k = 0;
-			}
-
-			// bah, missing blend!
-			if( panimvalue->num.valid > k )
-			{
-				angles1[j] = panimvalue[k+1].value;
-
-				if( panimvalue->num.valid > k + 1 )
-				{
-					angles2[j] = panimvalue[k+2].value;
-				}
-				else
-				{
-					if( panimvalue->num.total > k + 1 )
-						angles2[j] = angles1[j];
-					else angles2[j] = panimvalue[panimvalue->num.valid+2].value;
-				}
-			}
-			else
-			{
-				angles1[j] = panimvalue[panimvalue->num.valid].value;
-				if( panimvalue->num.total > k + 1 )
-					angles2[j] = angles1[j];
-				else angles2[j] = panimvalue[panimvalue->num.valid+2].value;
-			}
-
-			angles1[j] = pbone->value[j+3] + angles1[j] * pbone->scale[j+3];
-			angles2[j] = pbone->value[j+3] + angles2[j] * pbone->scale[j+3];
-		}
-
-		if( pbone->bonecontroller[j+3] != -1 && adj != NULL )
-		{
-			angles1[j] += adj[pbone->bonecontroller[j+3]];
-			angles2[j] += adj[pbone->bonecontroller[j+3]];
-		}
-	}
-
-	if( !VectorCompare( angles1, angles2 ))
-	{
-		vec4_t	q1, q2;
-
-		AngleQuaternion( angles1, q1, true );
-		AngleQuaternion( angles2, q2, true );
-		QuaternionSlerp( q1, q2, s, q );
-	}
-	else
-	{
-		AngleQuaternion( angles1, q, true );
-	}
-}
-
-/*
-====================
-StudioCalcBonePosition
-
-====================
-*/
-void R_StudioCalcBonePosition( int frame, float s, mstudiobone_t *pbone, mstudioanim_t *panim, float *adj, vec3_t pos )
-{
-	vec3_t	origin1;
-	vec3_t	origin2;
-	int	j, k;
-
-	for( j = 0; j < 3; j++ )
-	{
-		if( !panim || panim->offset[j] == 0 )
-		{
-			origin2[j] = origin1[j] = pbone->value[j]; // default;
-		}
-		else
-		{
-			mstudioanimvalue_t	*panimvalue = (mstudioanimvalue_t *)((byte *)panim + panim->offset[j]);
-
-			k = frame;
-
-			// debug
-			if( panimvalue->num.total < panimvalue->num.valid )
-				k = 0;
-
-			// find span of values that includes the frame we want
-			while( panimvalue->num.total <= k )
-			{
-				k -= panimvalue->num.total;
-				panimvalue += panimvalue->num.valid + 1;
-
-  				// debug
-				if( panimvalue->num.total < panimvalue->num.valid )
-					k = 0;
-			}
-
-			// bah, missing blend!
-			if( panimvalue->num.valid > k )
-			{
-				origin1[j] = panimvalue[k+1].value;
-
-				if( panimvalue->num.valid > k + 1 )
-				{
-					origin2[j] = panimvalue[k+2].value;
-				}
-				else
-				{
-					if( panimvalue->num.total > k + 1 )
-						origin2[j] = origin1[j];
-					else origin2[j] = panimvalue[panimvalue->num.valid+2].value;
-				}
-			}
-			else
-			{
-				origin1[j] = panimvalue[panimvalue->num.valid].value;
-				if( panimvalue->num.total > k + 1 )
-					origin2[j] = origin1[j];
-				else origin2[j] = panimvalue[panimvalue->num.valid+2].value;
-			}
-
-			origin1[j] = pbone->value[j] + origin1[j] * pbone->scale[j];
-			origin2[j] = pbone->value[j] + origin2[j] * pbone->scale[j];
-		}
-
-		if( pbone->bonecontroller[j] != -1 && adj != NULL )
-		{
-			origin1[j] += adj[pbone->bonecontroller[j]];
-			origin2[j] += adj[pbone->bonecontroller[j]];
-		}
-	}
-
-	if( !VectorCompare( origin1, origin2 ))
-	{
-		VectorLerp( origin1, s, origin2, pos );
-	}
-	else
-	{
-		VectorCopy( origin1, pos );
-	}
-}
-
-/*
-====================
-StudioSlerpBones
-
-====================
-*/
-void R_StudioSlerpBones( int numbones, vec4_t q1[], float pos1[][3], vec4_t q2[], float pos2[][3], float s )
-{
-	int	i;
-
-	s = bound( 0.0f, s, 1.0f );
-
-	for( i = 0; i < numbones; i++ )
-	{
-		QuaternionSlerp( q1[i], q2[i], s, q1[i] );
-		VectorLerp( pos1[i], s, pos2[i], pos1[i] );
-	}
-}
 
 /*
 ====================
diff --git a/engine/ref_api.h b/engine/ref_api.h
index 3c14b719..1ac5adcb 100644
--- a/engine/ref_api.h
+++ b/engine/ref_api.h
@@ -32,7 +32,8 @@ GNU General Public License for more details.
 // RefAPI changelog:
 // 1. Initial release
 // 2. FS functions are removed, instead we have full fs_api_t
-#define REF_API_VERSION 2
+// 3. SlerpBones, CalcBonePosition/Quaternion calls were moved to libpublic/mathlib
+#define REF_API_VERSION 3
 
 
 #define TF_SKY		(TF_SKYSIDE|TF_NOMIPMAP)
@@ -312,9 +313,6 @@ typedef struct ref_api_s
 	void (*Mod_CreatePolygonsForHull)( int hullnum );
 
 	// studio models
-	void (*R_StudioSlerpBones)( int numbones, vec4_t q1[], float pos1[][3], vec4_t q2[], float pos2[][3], float s );
-	void (*R_StudioCalcBoneQuaternion)( int frame, float s, mstudiobone_t *pbone, mstudioanim_t *panim, float *adj, vec4_t q );
-	void (*R_StudioCalcBonePosition)( int frame, float s, mstudiobone_t *pbone, mstudioanim_t *panim, vec3_t adj, vec3_t pos );
 	void *(*R_StudioGetAnim)( studiohdr_t *m_pStudioHeader, model_t *m_pSubModel, mstudioseqdesc_t *pseqdesc );
 	void	(*pfnStudioEvent)( const struct mstudioevent_s *event, const cl_entity_t *entity );
 
diff --git a/public/xash3d_mathlib.c b/public/xash3d_mathlib.c
index 2fd8f705..39dc3089 100644
--- a/public/xash3d_mathlib.c
+++ b/public/xash3d_mathlib.c
@@ -872,3 +872,193 @@ int BoxOnPlaneSide( const vec3_t emins, const vec3_t emaxs, const mplane_t *p )
 	return sides;
 }
 
+/*
+====================
+StudioSlerpBones
+
+====================
+*/
+void R_StudioSlerpBones( int numbones, vec4_t q1[], float pos1[][3], const vec4_t q2[], const float pos2[][3], float s )
+{
+	int	i;
+
+	s = bound( 0.0f, s, 1.0f );
+
+	for( i = 0; i < numbones; i++ )
+	{
+		QuaternionSlerp( q1[i], q2[i], s, q1[i] );
+		VectorLerp( pos1[i], s, pos2[i], pos1[i] );
+	}
+}
+
+/*
+====================
+StudioCalcBoneQuaternion
+
+====================
+*/
+void R_StudioCalcBoneQuaternion( int frame, float s, const mstudiobone_t *pbone, const mstudioanim_t *panim, const float *adj, vec4_t q )
+{
+	vec3_t	angles1;
+	vec3_t	angles2;
+	int	j, k;
+
+	for( j = 0; j < 3; j++ )
+	{
+		if( !panim || panim->offset[j+3] == 0 )
+		{
+			angles2[j] = angles1[j] = pbone->value[j+3]; // default;
+		}
+		else
+		{
+			mstudioanimvalue_t *panimvalue = (mstudioanimvalue_t *)((byte *)panim + panim->offset[j+3]);
+
+			k = frame;
+
+			// debug
+			if( panimvalue->num.total < panimvalue->num.valid )
+				k = 0;
+
+			// find span of values that includes the frame we want
+			while( panimvalue->num.total <= k )
+			{
+				k -= panimvalue->num.total;
+				panimvalue += panimvalue->num.valid + 1;
+
+				// debug
+				if( panimvalue->num.total < panimvalue->num.valid )
+					k = 0;
+			}
+
+			// bah, missing blend!
+			if( panimvalue->num.valid > k )
+			{
+				angles1[j] = panimvalue[k+1].value;
+
+				if( panimvalue->num.valid > k + 1 )
+				{
+					angles2[j] = panimvalue[k+2].value;
+				}
+				else
+				{
+					if( panimvalue->num.total > k + 1 )
+						angles2[j] = angles1[j];
+					else angles2[j] = panimvalue[panimvalue->num.valid+2].value;
+				}
+			}
+			else
+			{
+				angles1[j] = panimvalue[panimvalue->num.valid].value;
+				if( panimvalue->num.total > k + 1 )
+					angles2[j] = angles1[j];
+				else angles2[j] = panimvalue[panimvalue->num.valid+2].value;
+			}
+
+			angles1[j] = pbone->value[j+3] + angles1[j] * pbone->scale[j+3];
+			angles2[j] = pbone->value[j+3] + angles2[j] * pbone->scale[j+3];
+		}
+
+		if( pbone->bonecontroller[j+3] != -1 && adj != NULL )
+		{
+			angles1[j] += adj[pbone->bonecontroller[j+3]];
+			angles2[j] += adj[pbone->bonecontroller[j+3]];
+		}
+	}
+
+	if( !VectorCompare( angles1, angles2 ))
+	{
+		vec4_t	q1, q2;
+
+		AngleQuaternion( angles1, q1, true );
+		AngleQuaternion( angles2, q2, true );
+		QuaternionSlerp( q1, q2, s, q );
+	}
+	else
+	{
+		AngleQuaternion( angles1, q, true );
+	}
+}
+
+/*
+====================
+StudioCalcBonePosition
+
+====================
+*/
+void R_StudioCalcBonePosition( int frame, float s, const mstudiobone_t *pbone, const mstudioanim_t *panim, const float *adj, vec3_t pos )
+{
+	vec3_t	origin1;
+	vec3_t	origin2;
+	int	j, k;
+
+	for( j = 0; j < 3; j++ )
+	{
+		if( !panim || panim->offset[j] == 0 )
+		{
+			origin2[j] = origin1[j] = pbone->value[j]; // default;
+		}
+		else
+		{
+			mstudioanimvalue_t	*panimvalue = (mstudioanimvalue_t *)((byte *)panim + panim->offset[j]);
+
+			k = frame;
+
+			// debug
+			if( panimvalue->num.total < panimvalue->num.valid )
+				k = 0;
+
+			// find span of values that includes the frame we want
+			while( panimvalue->num.total <= k )
+			{
+				k -= panimvalue->num.total;
+				panimvalue += panimvalue->num.valid + 1;
+
+				// debug
+				if( panimvalue->num.total < panimvalue->num.valid )
+					k = 0;
+			}
+
+			// bah, missing blend!
+			if( panimvalue->num.valid > k )
+			{
+				origin1[j] = panimvalue[k+1].value;
+
+				if( panimvalue->num.valid > k + 1 )
+				{
+					origin2[j] = panimvalue[k+2].value;
+				}
+				else
+				{
+					if( panimvalue->num.total > k + 1 )
+						origin2[j] = origin1[j];
+					else origin2[j] = panimvalue[panimvalue->num.valid+2].value;
+				}
+			}
+			else
+			{
+				origin1[j] = panimvalue[panimvalue->num.valid].value;
+				if( panimvalue->num.total > k + 1 )
+					origin2[j] = origin1[j];
+				else origin2[j] = panimvalue[panimvalue->num.valid+2].value;
+			}
+
+			origin1[j] = pbone->value[j] + origin1[j] * pbone->scale[j];
+			origin2[j] = pbone->value[j] + origin2[j] * pbone->scale[j];
+		}
+
+		if( pbone->bonecontroller[j] != -1 && adj != NULL )
+		{
+			origin1[j] += adj[pbone->bonecontroller[j]];
+			origin2[j] += adj[pbone->bonecontroller[j]];
+		}
+	}
+
+	if( !VectorCompare( origin1, origin2 ))
+	{
+		VectorLerp( origin1, s, origin2, pos );
+	}
+	else
+	{
+		VectorCopy( origin1, pos );
+	}
+}
diff --git a/public/xash3d_mathlib.h b/public/xash3d_mathlib.h
index 259c79fb..02c10c3e 100644
--- a/public/xash3d_mathlib.h
+++ b/public/xash3d_mathlib.h
@@ -23,6 +23,7 @@ GNU General Public License for more details.
 
 #include "build.h"
 #include "com_model.h"
+#include "studio.h"
 
 // euler angle order
 #define PITCH		0
@@ -210,6 +211,10 @@ qboolean Matrix4x4_Invert_Full( matrix4x4 out, const matrix4x4 in1 );
 float V_CalcFov( float *fov_x, float width, float height );
 void V_AdjustFov( float *fov_x, float *fov_y, float width, float height, qboolean lock_x );
 
+void R_StudioSlerpBones( int numbones, vec4_t q1[], float pos1[][3], const vec4_t q2[], const float pos2[][3], float s );
+void R_StudioCalcBoneQuaternion( int frame, float s, const mstudiobone_t *pbone, const mstudioanim_t *panim, const float *adj, vec4_t q );
+void R_StudioCalcBonePosition( int frame, float s, const mstudiobone_t *pbone, const mstudioanim_t *panim, const vec3_t adj, vec3_t pos );
+
 int BoxOnPlaneSide( const vec3_t emins, const vec3_t emaxs, const mplane_t *p );
 #define BOX_ON_PLANE_SIDE( emins, emaxs, p )			\
 	((( p )->type < 3 ) ?				\
diff --git a/ref/gl/gl_studio.c b/ref/gl/gl_studio.c
index af117914..1c0aa6a4 100644
--- a/ref/gl/gl_studio.c
+++ b/ref/gl/gl_studio.c
@@ -847,8 +847,8 @@ void R_StudioCalcRotations( cl_entity_t *e, float pos[][3], vec4_t *q, mstudiose
 
 	for( i = 0; i < m_pStudioHeader->numbones; i++, pbone++, panim++ )
 	{
-		gEngfuncs.R_StudioCalcBoneQuaternion( frame, s, pbone, panim, adj, q[i] );
-		gEngfuncs.R_StudioCalcBonePosition( frame, s, pbone, panim, adj, pos[i] );
+		R_StudioCalcBoneQuaternion( frame, s, pbone, panim, adj, q[i] );
+		R_StudioCalcBonePosition( frame, s, pbone, panim, adj, pos[i] );
 	}
 
 	if( pseqdesc->motiontype & STUDIO_X ) pos[pseqdesc->motionbone][0] = 0.0f;
@@ -960,7 +960,7 @@ void R_StudioSetupBones( cl_entity_t *e )
 		dadt = R_StudioEstimateInterpolant( e );
 		s = (e->curstate.blending[0] * dadt + e->latched.prevblending[0] * (1.0f - dadt)) / 255.0f;
 
-		gEngfuncs.R_StudioSlerpBones( m_pStudioHeader->numbones, q, pos, q2, pos2, s );
+		R_StudioSlerpBones( m_pStudioHeader->numbones, q, pos, q2, pos2, s );
 
 		if( pseqdesc->numblends == 4 )
 		{
@@ -971,10 +971,10 @@ void R_StudioSetupBones( cl_entity_t *e )
 			R_StudioCalcRotations( e, pos4, q4, pseqdesc, panim, f );
 
 			s = (e->curstate.blending[0] * dadt + e->latched.prevblending[0] * (1.0f - dadt)) / 255.0f;
-			gEngfuncs.R_StudioSlerpBones( m_pStudioHeader->numbones, q3, pos3, q4, pos4, s );
+			R_StudioSlerpBones( m_pStudioHeader->numbones, q3, pos3, q4, pos4, s );
 
 			s = (e->curstate.blending[1] * dadt + e->latched.prevblending[1] * (1.0f - dadt)) / 255.0f;
-			gEngfuncs.R_StudioSlerpBones( m_pStudioHeader->numbones, q, pos, q3, pos3, s );
+			R_StudioSlerpBones( m_pStudioHeader->numbones, q, pos, q3, pos3, s );
 		}
 	}
 
@@ -997,7 +997,7 @@ void R_StudioSetupBones( cl_entity_t *e )
 			R_StudioCalcRotations( e, pos2, q2, pseqdesc, panim, e->latched.prevframe );
 
 			s = (e->latched.prevseqblending[0]) / 255.0f;
-			gEngfuncs.R_StudioSlerpBones( m_pStudioHeader->numbones, q1b, pos1b, q2, pos2, s );
+			R_StudioSlerpBones( m_pStudioHeader->numbones, q1b, pos1b, q2, pos2, s );
 
 			if( pseqdesc->numblends == 4 )
 			{
@@ -1008,15 +1008,15 @@ void R_StudioSetupBones( cl_entity_t *e )
 				R_StudioCalcRotations( e, pos4, q4, pseqdesc, panim, e->latched.prevframe );
 
 				s = (e->latched.prevseqblending[0]) / 255.0f;
-				gEngfuncs.R_StudioSlerpBones( m_pStudioHeader->numbones, q3, pos3, q4, pos4, s );
+				R_StudioSlerpBones( m_pStudioHeader->numbones, q3, pos3, q4, pos4, s );
 
 				s = (e->latched.prevseqblending[1]) / 255.0f;
-				gEngfuncs.R_StudioSlerpBones( m_pStudioHeader->numbones, q1b, pos1b, q3, pos3, s );
+				R_StudioSlerpBones( m_pStudioHeader->numbones, q1b, pos1b, q3, pos3, s );
 			}
 		}
 
 		s = 1.0f - ( g_studio.time - e->latched.sequencetime ) / 0.2f;
-		gEngfuncs.R_StudioSlerpBones( m_pStudioHeader->numbones, q, pos, q1b, pos1b, s );
+		R_StudioSlerpBones( m_pStudioHeader->numbones, q, pos, q1b, pos1b, s );
 	}
 	else
 	{
diff --git a/ref/soft/r_studio.c b/ref/soft/r_studio.c
index a678715b..e3df3fa3 100644
--- a/ref/soft/r_studio.c
+++ b/ref/soft/r_studio.c
@@ -843,8 +843,8 @@ void R_StudioCalcRotations( cl_entity_t *e, float pos[][3], vec4_t *q, mstudiose
 
 	for( i = 0; i < m_pStudioHeader->numbones; i++, pbone++, panim++ )
 	{
-		gEngfuncs.R_StudioCalcBoneQuaternion( frame, s, pbone, panim, adj, q[i] );
-		gEngfuncs.R_StudioCalcBonePosition( frame, s, pbone, panim, adj, pos[i] );
+		R_StudioCalcBoneQuaternion( frame, s, pbone, panim, adj, q[i] );
+		R_StudioCalcBonePosition( frame, s, pbone, panim, adj, pos[i] );
 	}
 
 	if( pseqdesc->motiontype & STUDIO_X ) pos[pseqdesc->motionbone][0] = 0.0f;
@@ -956,7 +956,7 @@ void R_StudioSetupBones( cl_entity_t *e )
 		dadt = R_StudioEstimateInterpolant( e );
 		s = (e->curstate.blending[0] * dadt + e->latched.prevblending[0] * (1.0f - dadt)) / 255.0f;
 
-		gEngfuncs.R_StudioSlerpBones( m_pStudioHeader->numbones, q, pos, q2, pos2, s );
+		R_StudioSlerpBones( m_pStudioHeader->numbones, q, pos, q2, pos2, s );
 
 		if( pseqdesc->numblends == 4 )
 		{
@@ -967,10 +967,10 @@ void R_StudioSetupBones( cl_entity_t *e )
 			R_StudioCalcRotations( e, pos4, q4, pseqdesc, panim, f );
 
 			s = (e->curstate.blending[0] * dadt + e->latched.prevblending[0] * (1.0f - dadt)) / 255.0f;
-			gEngfuncs.R_StudioSlerpBones( m_pStudioHeader->numbones, q3, pos3, q4, pos4, s );
+			R_StudioSlerpBones( m_pStudioHeader->numbones, q3, pos3, q4, pos4, s );
 
 			s = (e->curstate.blending[1] * dadt + e->latched.prevblending[1] * (1.0f - dadt)) / 255.0f;
-			gEngfuncs.R_StudioSlerpBones( m_pStudioHeader->numbones, q, pos, q3, pos3, s );
+			R_StudioSlerpBones( m_pStudioHeader->numbones, q, pos, q3, pos3, s );
 		}
 	}
 
@@ -993,7 +993,7 @@ void R_StudioSetupBones( cl_entity_t *e )
 			R_StudioCalcRotations( e, pos2, q2, pseqdesc, panim, e->latched.prevframe );
 
 			s = (e->latched.prevseqblending[0]) / 255.0f;
-			gEngfuncs.R_StudioSlerpBones( m_pStudioHeader->numbones, q1b, pos1b, q2, pos2, s );
+			R_StudioSlerpBones( m_pStudioHeader->numbones, q1b, pos1b, q2, pos2, s );
 
 			if( pseqdesc->numblends == 4 )
 			{
@@ -1004,15 +1004,15 @@ void R_StudioSetupBones( cl_entity_t *e )
 				R_StudioCalcRotations( e, pos4, q4, pseqdesc, panim, e->latched.prevframe );
 
 				s = (e->latched.prevseqblending[0]) / 255.0f;
-				gEngfuncs.R_StudioSlerpBones( m_pStudioHeader->numbones, q3, pos3, q4, pos4, s );
+				R_StudioSlerpBones( m_pStudioHeader->numbones, q3, pos3, q4, pos4, s );
 
 				s = (e->latched.prevseqblending[1]) / 255.0f;
-				gEngfuncs.R_StudioSlerpBones( m_pStudioHeader->numbones, q1b, pos1b, q3, pos3, s );
+				R_StudioSlerpBones( m_pStudioHeader->numbones, q1b, pos1b, q3, pos3, s );
 			}
 		}
 
 		s = 1.0f - ( g_studio.time - e->latched.sequencetime ) / 0.2f;
-		gEngfuncs.R_StudioSlerpBones( m_pStudioHeader->numbones, q, pos, q1b, pos1b, s );
+		R_StudioSlerpBones( m_pStudioHeader->numbones, q, pos, q1b, pos1b, s );
 	}
 	else
 	{