diff --git a/ref/gl/gl2_shim/gl2_shim.c b/ref/gl/gl2_shim/gl2_shim.c
index 3fa5df38..e2bf2c45 100644
--- a/ref/gl/gl2_shim/gl2_shim.c
+++ b/ref/gl/gl2_shim/gl2_shim.c
@@ -769,7 +769,6 @@ void GL2_ShimEndFrame( void )
 
 static void APIENTRY GL2_Begin( GLenum prim )
 {
-	int i;
 	if( gl2wrap.begin + MAX_BEGINEND_VERTS > GL2_MAX_VERTS )
 		GL2_ResetPersistentBuffer();
 
@@ -978,7 +977,6 @@ leave_label:
 
 static void APIENTRY GL2_End( void )
 {
-	int i;
 #ifdef QUAD_BATCH
 	if( gl2wrap.prim == GL_QUADS )
 	{
diff --git a/ref/gl/gl_alias.c b/ref/gl/gl_alias.c
index 6f426868..543213cd 100644
--- a/ref/gl/gl_alias.c
+++ b/ref/gl/gl_alias.c
@@ -704,7 +704,6 @@ static void GL_DrawAliasShadow( aliashdr_t *paliashdr )
 	float		vec_x, vec_y;
 	vec3_t		av, point;
 	int		*order;
-	float		height;
 	int		count;
 
 	if( FBitSet( RI.currententity->curstate.effects, EF_NOSHADOW ))
@@ -713,7 +712,6 @@ static void GL_DrawAliasShadow( aliashdr_t *paliashdr )
 	if( glState.stencilEnabled )
 		pglEnable( GL_STENCIL_TEST );
 
-	height = g_alias.lightspot[2] + 1.0f;
 	vec_x = -g_alias.lightvec[0] * 8.0f;
 	vec_y = -g_alias.lightvec[1] * 8.0f;
 
diff --git a/ref/gl/gl_image.c b/ref/gl/gl_image.c
index 216039fa..d51461d8 100644
--- a/ref/gl/gl_image.c
+++ b/ref/gl/gl_image.c
@@ -688,7 +688,7 @@ box filter 3x3
 static void GL_BoxFilter3x3( byte *out, const byte *in, int w, int h, int x, int y )
 {
 	int		r = 0, g = 0, b = 0, a = 0;
-	int		count = 0, acount = 0;
+	int		acount = 0;
 	int		i, j, u, v;
 	const byte	*pixel;
 
@@ -982,7 +982,6 @@ static qboolean GL_UploadTexture( gl_texture_t *tex, rgbdata_t *pic )
 	size_t		texsize, size;
 	uint		width, height, depth;
 	uint		i, j, numSides;
-	uint		offset = 0;
 	qboolean		normalMap;
 	qboolean		texture3d;
 	const byte	*bufend;
@@ -1028,7 +1027,6 @@ static qboolean GL_UploadTexture( gl_texture_t *tex, rgbdata_t *pic )
 
 	buf = pic->buffer;
 	bufend = pic->buffer + pic->size; // total image size include all the layers, cube sides, mipmaps
-	offset = gEngfuncs.Image_CalcImageSize( pic->type, pic->width, pic->height, pic->depth );
 	texsize = GL_CalcTextureSize( tex->format, tex->width, tex->height, tex->depth );
 	normalMap = FBitSet( tex->flags, TF_NORMALMAP ) ? true : false;
 	numSides = FBitSet( pic->flags, IMAGE_CUBEMAP ) ? 6 : 1;
@@ -1458,7 +1456,6 @@ int GL_LoadTextureArray( const char **names, int flags )
 	rgbdata_t		*pic, *src;
 	char		basename[256];
 	uint		numLayers = 0;
-	uint		picFlags = 0;
 	char		name[256];
 	gl_texture_t	*tex;
 	size_t		len = 0;
diff --git a/ref/gl/gl_rsurf.c b/ref/gl/gl_rsurf.c
index df6f0127..cd957c61 100644
--- a/ref/gl/gl_rsurf.c
+++ b/ref/gl/gl_rsurf.c
@@ -209,14 +209,12 @@ static void SubdividePolygon_r( model_t *loadmodel, msurface_t *warpface, int nu
 	float		dist[SUBDIVIDE_SIZE];
 	float		m, frac, *v;
 	int		i, j, k, f, b;
-	float		sample_size;
 	vec3_t		mins, maxs;
 	glpoly2_t		*poly;
 
 	if( numverts > ( SUBDIVIDE_SIZE - 4 ))
 		gEngfuncs.Host_Error( "%s: too many vertexes on face ( %i )\n", __func__, numverts );
 
-	sample_size = gEngfuncs.Mod_SampleSizeForFace( warpface );
 	BoundPoly( numverts, verts, mins, maxs );
 
 	for( i = 0; i < 3; i++ )
diff --git a/ref/gl/gl_studio.c b/ref/gl/gl_studio.c
index 8ca26135..11b26610 100644
--- a/ref/gl/gl_studio.c
+++ b/ref/gl/gl_studio.c
@@ -1265,7 +1265,7 @@ static void R_StudioEntityLight( alight_t *lightinfo )
 	float		minstrength, dist2, f, r2;
 	float		lstrength[MAX_LOCALLIGHTS];
 	cl_entity_t	*ent = RI.currententity;
-	vec3_t		mid, origin, pos;
+	vec3_t		mid, origin;
 
 	g_studio.numlocallights = 0;
 
@@ -1294,7 +1294,6 @@ static void R_StudioEntityLight( alight_t *lightinfo )
 			else VectorCopy( ent->origin, el->origin );
 		}
 
-		VectorCopy( el->origin, pos );
 		VectorSubtract( origin, el->origin, mid );
 
 		f = DotProduct( mid, mid );
@@ -1810,9 +1809,7 @@ generic path
 */
 static void R_StudioBuildArrayNormalMesh( short *ptricmds, vec3_t *pstudionorms, float s, float t )
 {
-	float	*lv;
 	int	i;
-	float alpha = tr.blend;
 
 	while(( i = *( ptricmds++ )))
 	{
@@ -1829,7 +1826,6 @@ static void R_StudioBuildArrayNormalMesh( short *ptricmds, vec3_t *pstudionorms,
 		{
 			GLubyte *cl;
 			cl = g_studio.arraycolor[g_studio.numverts];
-			lv = (float *)g_studio.lightvalues[ptricmds[1]];
 
 			vertexState = R_StudioBuildIndices( tri_strip, vertexState );
 
@@ -1853,9 +1849,7 @@ generic path
 */
 static void R_StudioBuildArrayFloatMesh( short *ptricmds, vec3_t *pstudionorms )
 {
-	float	*lv;
 	int	i;
-	float alpha = tr.blend;
 
 	while(( i = *( ptricmds++ )))
 	{
@@ -1872,7 +1866,6 @@ static void R_StudioBuildArrayFloatMesh( short *ptricmds, vec3_t *pstudionorms )
 		{
 			GLubyte *cl;
 			cl = g_studio.arraycolor[g_studio.numverts];
-			lv = (float *)g_studio.lightvalues[ptricmds[1]];
 
 			vertexState = R_StudioBuildIndices( tri_strip, vertexState );
 
@@ -1900,7 +1893,6 @@ static void R_StudioBuildArrayChromeMesh( short *ptricmds, vec3_t *pstudionorms,
 	int	i, idx;
 	qboolean	glowShell = (scale > 0.0f) ? true : false;
 	vec3_t	vert;
-	float alpha = tr.blend;
 
 	while(( i = *( ptricmds++ )))
 	{
@@ -2688,7 +2680,7 @@ R_StudioDrawPointsShadow
 */
 static void R_StudioDrawPointsShadow( void )
 {
-	float		*av, height;
+	float		*av;
 	float		vec_x, vec_y;
 	mstudiomesh_t	*pmesh;
 	vec3_t		point;
@@ -2700,7 +2692,6 @@ static void R_StudioDrawPointsShadow( void )
 	if( glState.stencilEnabled )
 		pglEnable( GL_STENCIL_TEST );
 
-	height = g_studio.lightspot[2] + 1.0f;
 	vec_x = -g_studio.lightvec[0] * 8.0f;
 	vec_y = -g_studio.lightvec[1] * 8.0f;