size = room_height

s = surface_create(size, size)

for(i=0; i<room_width; i+=size)
{
surface_set_target(s)

view_xview = i
view_yview = 0
view_wview = size
view_hview = size
view_wport = size
view_hport = size
//
screen_redraw()
//screen_save('level.png')
//
surface_reset_target()
surface_save(s, 'level' + string(i/size) + '.png')
}