Added tweaks that'll help with 3D Glasses:

r_viewmodelscale (try 5)
gl_mono (0/1)

src/client/defs.h

@@ -48,6 +48,7 @@ var vector autocvar_vgui_color = [255,170,0];
 var vector autocvar_v_gunofs = [0,0,0];
 var int autocvar_r_viewmodelpass = 0;
 var float autocvar_r_viewmodelfov = 90.0f;
+var float autocvar_r_viewmodelscale = 1.0f;
 
 /* particle descriptors */
 var float PARTICLE_BLOOD;

src/client/view.c

@@ -144,6 +144,16 @@ void View_DrawViewModel(void)
 
 	makevectors(view_angles);
 	eViewModel.angles = view_angles;
+
+	// Give the gun a tilt effect like in old HL/CS versions
+	if (autocvar_v_bobclassic == 1) {
+		eViewModel.angles[2] = -pSeat->fBob;
+	}
+
+	/* now apply the scale hack */
+	eViewModel.scale = autocvar_r_viewmodelscale;
+	pSeat->fBob *= autocvar_r_viewmodelscale;
+	
 	eViewModel.origin = pSeat->vPlayerOrigin + pl.view_ofs;
 	eViewModel.origin += [0,0,-1] + (v_forward * (pSeat->fBob * 0.4))
 			+ (v_forward * autocvar_v_gunofs[0])
@@ -162,11 +172,6 @@ void View_DrawViewModel(void)
 		}
 	}
 
-	// Give the gun a tilt effect like in old HL/CS versions
-	if (autocvar_v_bobclassic == 1) {
-		eViewModel.angles[2] = -pSeat->fBob;
-	}
-
 	// Only bother when zoomed out
 	if (pl.viewzoom == 1.0f) {
 		// Update muzzleflash position and draw it

src/gs-entbase/client/baseentity.cpp

@@ -83,7 +83,7 @@ CBaseEntity::RenderFXPass(void)
 
 		r = random() * 0.5f;
 		makevectors(angles);
-		
+
 		if (cltime & 1) {
 			v_right *= 0.75 + r;
 			renderflags |= RF_USEAXIS;
@@ -91,7 +91,7 @@ CBaseEntity::RenderFXPass(void)
 			v_up *= 1.0 - (random() * 0.2f);
 			renderflags |= RF_USEAXIS;
 		}
-		
+
 		dist = vlen(getproperty(VF_ORIGIN) - origin);
 		if (dist < 256) {
 			float distalpha = dist / 256;

valve/data.pk3dir/glsl/defaultskin.glsl

@@ -6,6 +6,7 @@
 !!cvardf gl_affinemodels=0
 !!cvardf gl_ldr=1
 !!cvardf gl_halflambert=1
+!!cvardf gl_mono=0
 
 #include "sys/defs.h"
 
@@ -108,6 +109,11 @@ varying vec3 light;
 
 		diffuse_f *= e_colourident;
 
+		if (gl_mono == 1.0) {
+			float bw = (diffuse_f.r + diffuse_f.g + diffuse_f.b) / 3.0;
+			diffuse_f.rgb = vec3(bw, bw, bw);
+		}
+
 		gl_FragColor = diffuse_f;
 	}
 #endif

valve/data.pk3dir/glsl/defaultskybox.glsl

@@ -1,6 +1,7 @@
-!!ver 110
+!!ver 130
 !!permu FOG
 !!samps reflectcube
+!!cvardf gl_mono=0
 
 #include "sys/defs.h"
 #include "sys/fog.h"
@@ -18,6 +19,12 @@ void main ()
 void main ()
 {
 	vec4 skybox = textureCube(s_reflectcube, pos);
+
+	if (gl_mono == 1.0) {
+		float bw = (skybox.r + skybox.g + skybox.b) / 3.0;
+		skybox.rgb = vec3(bw, bw, bw) * 1.5;
+	}
+
 	gl_FragColor = vec4(fog3(skybox.rgb), 1.0);
 }
 #endif

valve/data.pk3dir/glsl/defaultsprite.glsl

@@ -1,5 +1,7 @@
+!!ver 130
 !!permu FOG
 !!samps 1
+!!cvardf gl_mono=0
 
 #include "sys/fog.h"
 #ifdef VERTEX_SHADER
@@ -31,6 +33,11 @@ void main ()
 
 	col = fog4blend(col * vc * e_colourident * e_vlscale);
 
+	if (gl_mono == 1.0) {
+		float bw = (col.r + col.g + col.b) / 3.0;
+		col.rgb = vec3(bw, bw, bw) * 1.5;
+	}
+
 	gl_FragColor = col;
 }
 #endif

valve/data.pk3dir/glsl/defaultwall.glsl

@@ -1,9 +1,10 @@
-!!ver 110
+!!ver 130
 !!permu LIGHTSTYLED
 !!samps diffuse reflectcube normalmap
 
 !!samps lightmap
 !!samps =LIGHTSTYLED lightmap1 lightmap2 lightmap3
+!!cvardf gl_mono=0
 
 #include "sys/defs.h"
 
@@ -103,6 +104,12 @@ varying mat3 invsurface;
 #endif
 
 		diffuse_f *= e_colourident;
+
+		if (gl_mono == 1.0) {
+			float bw = (diffuse_f.r + diffuse_f.g + diffuse_f.b) / 3.0;
+			diffuse_f.rgb = vec3(bw, bw, bw);
+		}
+
 		gl_FragColor = diffuse_f;
 		
 	}

valve/data.pk3dir/glsl/defaultwarp.glsl

@@ -2,6 +2,7 @@
 !!permu FOG
 !!cvarf r_wateralpha
 !!samps diffuse lightmap
+!!cvardf gl_mono=0
 
 #include "sys/defs.h"
 
@@ -41,6 +42,10 @@ void main ()
 	ts *= (texture2D(s_lightmap, lm0) * e_lmscale).rgb;
 #endif
 
+	if (gl_mono == 1.0) {
+		float bw = (ts.r + ts.g + ts.b) / 3.0;
+		ts.rgb = vec3(bw, bw, bw);
+	}
 	gl_FragColor = fog4(vec4(ts, USEALPHA) * e_colourident);
 }
 #endif