diff --git a/common/3d/draw.cpp b/common/3d/draw.cpp
index 27fabccf4..6a32c54e0 100644
--- a/common/3d/draw.cpp
+++ b/common/3d/draw.cpp
@@ -228,11 +228,11 @@ bool g3_draw_poly(int nv,g3s_point **pointlist)
 	return 0;	//say it drew
 }
 
-static bool must_clip_tmap_face(int nv,g3s_codes cc,grs_bitmap *bm);
+static void must_clip_tmap_face(int nv,g3s_codes cc,grs_bitmap *bm);
 
 //draw a texture-mapped face.
 //returns 1 if off screen, 0 if drew
-bool g3_draw_tmap(int nv,g3s_point **pointlist,const g3s_uvl *uvl_list,g3s_lrgb *light_rgb,grs_bitmap *bm)
+void g3_draw_tmap(int nv,g3s_point **pointlist,const g3s_uvl *uvl_list,g3s_lrgb *light_rgb,grs_bitmap *bm)
 {
 	int i;
 	g3s_point **bufptr;
@@ -259,10 +259,13 @@ bool g3_draw_tmap(int nv,g3s_point **pointlist,const g3s_uvl *uvl_list,g3s_lrgb
 	}
 
 	if (cc.uand)
-		return 1;	//all points off screen
+		return;	//all points off screen
 
 	if (cc.uor)
-		return must_clip_tmap_face(nv,cc,bm);
+	{
+		must_clip_tmap_face(nv,cc,bm);
+		return;
+	}
 
 	//now make list of 2d coords (& check for overflow)
 
@@ -274,16 +277,14 @@ bool g3_draw_tmap(int nv,g3s_point **pointlist,const g3s_uvl *uvl_list,g3s_lrgb
 
 		if (p->p3_flags&PF_OVERFLOW) {
 			Int3();		//should not overflow after clip
-			return 255;
+			return;
 		}
 	}
 
 	(*tmap_drawer_ptr)(bm,nv,bufptr);
-
-	return 0;	//say it drew
 }
 
-static bool must_clip_tmap_face(int nv,g3s_codes cc,grs_bitmap *bm)
+static void must_clip_tmap_face(int nv,g3s_codes cc,grs_bitmap *bm)
 {
 	g3s_point **bufptr;
 	int i;
@@ -315,9 +316,6 @@ free_points:
 			free_temp_point(bufptr[i]);
 
 //	Assert(free_point_num==0);
-	
-	return 0;
-
 }
 
 //draw a sortof sphere - i.e., the 2d radius is proportional to the 3d
diff --git a/common/include/3d.h b/common/include/3d.h
index 05efc61b7..a8ba6a100 100644
--- a/common/include/3d.h
+++ b/common/include/3d.h
@@ -176,7 +176,7 @@ bool g3_draw_poly(int nv,g3s_point **pointlist);
 
 //draw a texture-mapped face.
 //returns 1 if off screen, 0 if drew
-bool g3_draw_tmap(int nv,g3s_point **pointlist,const g3s_uvl *uvl_list,g3s_lrgb *light_rgb,grs_bitmap *bm);
+void g3_draw_tmap(int nv,g3s_point **pointlist,const g3s_uvl *uvl_list,g3s_lrgb *light_rgb,grs_bitmap *bm);
 
 //draw a sortof sphere - i.e., the 2d radius is proportional to the 3d
 //radius, but not to the distance from the eye
diff --git a/common/include/ogl_init.h b/common/include/ogl_init.h
index 0f1ea2368..66257ab30 100644
--- a/common/include/ogl_init.h
+++ b/common/include/ogl_init.h
@@ -107,7 +107,7 @@ unsigned char ogl_ugpixel( grs_bitmap * bitmap, int x, int y );
 void ogl_ulinec(int left, int top, int right, int bot, int c);
 
 #include "3d.h"
-bool g3_draw_tmap_2(int nv,g3s_point **pointlist,g3s_uvl *uvl_list,g3s_lrgb *light_rgb, grs_bitmap *bmbot,grs_bitmap *bm, int orient);
+void g3_draw_tmap_2(int nv,g3s_point **pointlist,g3s_uvl *uvl_list,g3s_lrgb *light_rgb, grs_bitmap *bmbot,grs_bitmap *bm, int orient);
 
 void ogl_draw_vertex_reticle(int cross,int primary,int secondary,int color,int alpha,int size_offs);
 void ogl_toggle_depth_test(int enable);
diff --git a/similar/arch/ogl/ogl.cpp b/similar/arch/ogl/ogl.cpp
index 92fd027d6..8355ccd9b 100644
--- a/similar/arch/ogl/ogl.cpp
+++ b/similar/arch/ogl/ogl.cpp
@@ -866,7 +866,7 @@ void draw_tmap_flat(grs_bitmap *,int,g3s_point **){
 /*
  * Everything texturemapped (walls, robots, ship)
  */ 
-bool g3_draw_tmap(int nv,g3s_point **pointlist,const g3s_uvl *uvl_list,g3s_lrgb *light_rgb,grs_bitmap *bm)
+void g3_draw_tmap(int nv,g3s_point **pointlist,const g3s_uvl *uvl_list,g3s_lrgb *light_rgb,grs_bitmap *bm)
 {
 	int c, index2, index3, index4;
 	GLfloat color_alpha = 1.0;
@@ -887,7 +887,7 @@ bool g3_draw_tmap(int nv,g3s_point **pointlist,const g3s_uvl *uvl_list,g3s_lrgb
 		color_alpha = 1.0 - (grd_curcanv->cv_fade_level/(GLfloat)NUM_LIGHTING_LEVELS);
 	} else {
 		glmprintf((0,"g3_draw_tmap: unhandled tmap_drawer %p\n",tmap_drawer_ptr));
-		return 0;
+		return;
 	}
 
 	RAIIdmem<GLfloat> vertex_array, color_array, texcoord_array;
@@ -930,13 +930,12 @@ bool g3_draw_tmap(int nv,g3s_point **pointlist,const g3s_uvl *uvl_list,g3s_lrgb
 	glDisableClientState(GL_VERTEX_ARRAY);
 	glDisableClientState(GL_COLOR_ARRAY);
 	glDisableClientState(GL_TEXTURE_COORD_ARRAY);
-	return 0;
 }
 
 /*
  * Everything texturemapped with secondary texture (walls with secondary texture)
  */
-bool g3_draw_tmap_2(int nv, g3s_point **pointlist, g3s_uvl *uvl_list, g3s_lrgb *light_rgb, grs_bitmap *bmbot, grs_bitmap *bm, int orient)
+void g3_draw_tmap_2(int nv, g3s_point **pointlist, g3s_uvl *uvl_list, g3s_lrgb *light_rgb, grs_bitmap *bmbot, grs_bitmap *bm, int orient)
 {
 	int c, index2, index3, index4;
 
@@ -997,8 +996,6 @@ bool g3_draw_tmap_2(int nv, g3s_point **pointlist, g3s_uvl *uvl_list, g3s_lrgb *
 	glDisableClientState(GL_VERTEX_ARRAY);
 	glDisableClientState(GL_COLOR_ARRAY);
 	glDisableClientState(GL_TEXTURE_COORD_ARRAY);
-
-	return 0;
 }
 
 /*