diff --git a/main.cpp b/main.cpp
index 58da1fe..e8c080a 100644
--- a/main.cpp
+++ b/main.cpp
@@ -42,8 +42,8 @@ int current_sector = 38;
 int current_sector2 = 38;
 
 vec2 position = { 1056.0f, -3616.0f };
-float height = 48.0f;
-float real_height = 48.0f;
+float height = 32.0f;
+float real_height = 32.0f;
 float orientation = 270.0f;
 
 float accel = 500.0f;
@@ -452,9 +452,10 @@ void drawColumn(sector &s, int screen_column, int start, int end, float a_inc, v
                 if (upper_wall_height>0.0f)
                 {
                     // Pinta la pared
+                    if (w->upper_surf)
                     for (int i=0; i<upper_wall_height; ++i) {
                         if (wall_start+i>=end) break;
-                        draw::putpd(screen_column, wall_start+i, w->surf->pixels[(int(v)%w->surf->w)+(int(cpix)%w->surf->h)*w->surf->w], stright_dist);
+                        draw::putpd(screen_column, wall_start+i, w->upper_surf->pixels[(int(v)%w->upper_surf->w)+(int(cpix)%w->upper_surf->h)*w->upper_surf->w], stright_dist);
                         cpix += dpix;
                     }
                     wall_start += upper_wall_height;
@@ -478,9 +479,10 @@ void drawColumn(sector &s, int screen_column, int start, int end, float a_inc, v
             {
                 cpix += (wall_height-lower_wall_height)*dpix;
                 // Pinta la pared
+                if (w->lower_surf)
                 for (int i=0; i<lower_wall_height; ++i) {
                     if (wall_end+i>=end) break;
-                    draw::putpd(screen_column, wall_end+i, w->surf->pixels[(int(v)%w->surf->w)+(int(cpix)%w->surf->h)*w->surf->w], stright_dist);
+                    draw::putpd(screen_column, wall_end+i, w->lower_surf->pixels[(int(v)%w->lower_surf->w)+(int(cpix)%w->lower_surf->h)*w->lower_surf->w], stright_dist);
                     cpix += dpix;
                 }
                 //wall_start += upper_wall_height;