diff -urN rt_v38/ax.py rt_v39/ax.py
--- rt_v38/ax.py	2018-04-26 00:47:41.000000000 +0900
+++ rt_v39/ax.py	2018-05-19 17:56:58.000000000 +0900
@@ -57,6 +57,8 @@
 		return new(p_, vs_)
 	e.rev = rev
 
+	e.str = lambda : 'p:{}, vs:{}'.format(e.p, e.vs)
+
 	return e
 
 one = new( mt.zero, vecs.one )
diff -urN rt_v38/cg.py rt_v39/cg.py
--- rt_v38/cg.py	2018-05-16 23:42:46.000000000 +0900
+++ rt_v39/cg.py	2018-05-17 11:49:32.000000000 +0900
@@ -58,6 +58,7 @@
 		img.cli_vwt.add_img()
 		if 'no_show' not in sys.argv:
 			wsec = max( cnt.wait_sec(), 0 )
+			wsec = ut.arg_f('show_sec', wsec)
 			fn_img = val.cli.get_prop('saved_fn_img')
 			img.show(fn_img, '', wsec, zm)
 	img.cli_vwt.close()
diff -urN rt_v38/cross.c rt_v39/cross.c
--- rt_v38/cross.c	2018-05-16 23:42:46.000000000 +0900
+++ rt_v39/cross.c	2018-05-19 14:02:39.000000000 +0900
@@ -218,7 +218,7 @@
 }
 
 int
-cross_cross_one(int kind_idx, struct ax *l2g, int eq_d, struct line *l_g, struct cross_ret *ret)
+cross_cross_one(int kind_idx, struct lstx *l2g, int eq_d, struct line *l_g, struct cross_ret *ret)
 {
 	switch(kind_idx){
 	case KIND_SQUARE:
@@ -231,7 +231,7 @@
 		break;
 	}
 
-	ax_tr_line(l2g, G2L, l_g, &ret->l);
+	lstx_tr_line(l2g, G2L, l_g, &ret->l);
 
 	switch(kind_idx){
 	case KIND_SQUARE:
@@ -253,7 +253,7 @@
 }
 
 void
-cross_get_nv(int kind_idx, struct ax *l2g, struct line *l_g, struct cross_ret *ret)
+cross_get_nv(int kind_idx, struct lstx *l2g, struct line *l_g, struct cross_ret *ret)
 {
 	double nv[3];
 	struct line l_nv;
@@ -288,19 +288,13 @@
 	}
 
 	line_new(&l_nv, ret->p, nv);
-	ax_tr_line(l2g, L2G, &l_nv, &ret->l_nv_g);
+	lstx_tr_line(l2g, L2G, &l_nv, &ret->l_nv_g);
 
 	unit(ret->l_nv_g.v, ret->nv);
 	unit(l_g->v, ret->eyev);
 	ret->ang_nv_eyev = dot( ret->nv, ret->eyev );
 }
 
-struct ax *
-get_ax_ptr(struct lstx *lx)
-{
-	return lx->n == 0 ? &ax_one : &lx->lst[0].ax;
-}
-
 void
 cross_cross(struct line *l_g, int prev_idx, struct cross_ret *ret)
 {
@@ -313,7 +307,7 @@
 	for(i=0; i<data->n; i++){
 		struct data_one *d = &data->lst[i];
 
-		if( !cross_cross_one( d->kind, get_ax_ptr(&d->l2g), prev_idx == i, l_g, &ret_ ) ){
+		if( !cross_cross_one( d->kind, &d->l2g, prev_idx == i, l_g, &ret_ ) ){
 			continue;
 		}
 		if( idx < 0 || ret_.t < ret->t ){
@@ -323,7 +317,7 @@
 	}
 	if( idx >= 0 ){
 		struct data_one *d = &data->lst[idx];
-		cross_get_nv( d->kind, get_ax_ptr(&d->l2g), l_g, ret );
+		cross_get_nv( d->kind, &d->l2g, l_g, ret );
 	}
 	ret->idx = idx;
 }
diff -urN rt_v38/cross.h rt_v39/cross.h
--- rt_v38/cross.h	2018-05-01 23:19:45.000000000 +0900
+++ rt_v39/cross.h	2018-05-19 14:02:39.000000000 +0900
@@ -31,8 +31,8 @@
 int pipe_side(int eq_d, struct cross_ret *ret);
 int cone_side(int eq_d, struct cross_ret *ret);
 
-int cross_cross_one(int kind_idx, struct ax *l2g, int eq_d, struct line *l_g, struct cross_ret *ret);
-void cross_get_nv(int kind_idx, struct ax *l2g, struct line *l_g, struct cross_ret *ret);
+int cross_cross_one(int kind_idx, struct lstx *l2g, int eq_d, struct line *l_g, struct cross_ret *ret);
+void cross_get_nv(int kind_idx, struct lstx *l2g, struct line *l_g, struct cross_ret *ret);
 
 void cross_cross(struct line *l_g, int prev_idx, struct cross_ret *ret);
 
diff -urN rt_v38/dat.py rt_v39/dat.py
--- rt_v38/dat.py	2018-05-16 23:42:46.000000000 +0900
+++ rt_v39/dat.py	2018-05-20 09:58:26.000000000 +0900
@@ -258,6 +258,38 @@
 	'm2g': [ ax.zoom_all(2) ],
 } ]
 
+export_test = [ {
+	'kind': 'export',
+	'export': 'copen',
+	'm2g': [ ax.zoom_all(0.5), ax.slide([-60,-60,0]) ],
+	'rxs': [
+		( 'm2g', 'append', 3, [ ax.slide_x(60) ] ),
+		( 'm2g', 'append', 3, [ ax.slide_y(60) ] ),
+	],
+} ]
+
+export_test2 = [ {
+	'kind': 'export',
+	'export': 'copen',
+	'm2g': [ ax.zoom_all(0.5), ax.slide([-60,-60,0]) ],
+	'rxs': [
+		( 'm2g', 'append', 3, [ ax.slide_x(60) ] ),
+		( 'm2g', 'append', 3, [ ax.slide_y(60) ] ),
+	],
+	'maps': [ { 'fn': 'IMG_3999_3.mov', 'fn_r': 'IMG_3999_4.mov', 't2m': [ ax.zoom_all(100) ] } ],
+} ]
+
+export_test3 = [ {
+	'kind': 'export',
+	'export': 'copen',
+	'l2m': [ ax.zoom_all(0.5), ax.slide([-60,-60,0]) ],
+	'rxs': [
+		( 'l2m', 'append', 3, [ ax.slide_x(60) ] ),
+		( 'l2m', 'append', 3, [ ax.slide_y(60) ] ),
+	],
+	'maps': [ { 'fn': 'IMG_3999_3.mov', 'fn_r': 'IMG_3999_4.mov', 't2m': [ ax.zoom_all(500) ] } ],
+} ]
+
 lights = [
 	{ 'p': mt.arr( [1,-1,-1] ) * 30, 'e': 2.5 },
 	{ 'p': mt.arr( [-1,1,1] ) * 30, 'e': 2.5 },
@@ -276,6 +308,8 @@
 		v = val.cli.geti(v)
 	d[k] = v
 
+ds_copy	= lambda ds: ut.map_lst( lambda d: d.copy(), ds )
+
 def m_setup(d, m):
 	# 'fn' in d
 
@@ -508,7 +542,7 @@
 			d_ = d.copy()
 			d_['rxs'] = rxs[:] # !
 			d_[targ_k] = targ[:]
-			d_['maps'] = ut.map_lst( lambda m: m.copy(), d.get('maps') ) # !
+			d_['maps'] = ds_copy( d.get('maps', [] ) )
 			ds.append(d_)
 			targ = lx + targ if i_a == 'insert' else targ + lx
 		return sum( map( d_setup, ds ), [] )
@@ -533,6 +567,24 @@
 	for k in def_rtd.keys():
 		if k not in rtd:
 			rtd[k] = def_rtd.get(k)
+	###
+
+	if kind == 'export' and 'export' in d:
+		data = eval( d.get('export') )
+
+		# copy !
+		data = ds_copy(data)
+		for d_ in data:
+			d_['maps'] = ds_copy( d_.get('maps', []) )
+
+		ds = []
+		for d_ in data:
+			d_['m2g'] = d_.get('m2g', []) + d.get('l2g')
+			ds += d_setup(d_)
+		for d_ in ds:
+			d_['maps'] = d_.get('maps', []) + d.get('maps', [])
+		return ds
+	###
 
 	kinds = [ 'square', 'circle', 'triangle', 'ball', 'pipe_side', 'cone_side' ]
 	if not val.cli.has_prop('kinds'):
@@ -551,6 +603,7 @@
 	data_name = ut.arg_s('data_name', 'copen')
 	data = eval( data_name )
 	data = sum( map( d_setup, data ), [] )
+	#print('data={}'.format(data))
 	val.cli.set_prop('data', typ_data, data)
 	val.cli.set_prop('lights', '[ltd]', lights)
 # EOF
diff -urN rt_v38/rt.py rt_v39/rt.py
--- rt_v38/rt.py	2018-05-17 00:10:25.000000000 +0900
+++ rt_v39/rt.py	2018-05-18 21:28:17.000000000 +0900
@@ -116,8 +116,7 @@
 	if nest_rate < 0.01:
 		return []
 
-	#(idx, l_nv_g, nv, eyev, ang_nv_eyev) = cross.cross_(l_g, prev_idx)
-	(idx, l_nv_g, nv, eyev, ang_nv_eyev) = cross.cli.cross_(l_g, prev_idx)
+	(idx, l_nv_g, nv, eyev, ang_nv_eyev) = cross.cross_(l_g, prev_idx)
 
 	if idx < 0:
 		return []
@@ -129,14 +128,12 @@
 	rev = ang_nv_eyev_nega < 0
 
 	col = map_col( idx, l_nv_g, rev, sec )
-	#col = cli.map_col( idx, l_nv_g, rev, sec )
 
 	col = mt.arr(col)
 
 	base = rtd.get('base', 0.3)
 
 	diff = calc_diff(idx, crsp, nv, ang_nv_eyev)
-	#diff = cli.calc_diff(idx, crsp, nv, ang_nv_eyev)
 	col = col * (base + diff)
 
 	col_ = reflect_col(rtd, crsp, nv, eyev, ang_nv_eyev, sec, nest_rate, idx)
@@ -157,7 +154,7 @@
 		p = lstx.tr_p( wh2g, 'l2g', mt.arr( [ix,iy,-d_] ) )
 		l_g = line.new_p2(eyep, p)
 
-		col = cli.get_col(l_g, sec, 1.0, -1)
+		col = get_col(l_g, sec, 1.0, -1)
 
 		if col != []:
 			col = np.fmin( col, 255 )
diff -urN rt_v38/ut.py rt_v39/ut.py
--- rt_v38/ut.py	2018-05-16 23:42:46.000000000 +0900
+++ rt_v39/ut.py	2018-05-19 17:55:01.000000000 +0900
@@ -39,6 +39,7 @@
 dic_cache_pop = lambda d, k, def_val=None: d.pop(k) if k in d else def_val
 
 if_not_set = lambda d, k, v: dic_cache(d, k, lambda : v)
+pop_if_in = lambda d, k: d.pop(k) if k in d else None
 
 in_range = lambda i, n: 0<=i and i<n
 in_wh = lambda x, y, w, h: in_range(x, w) and in_range(y, h)
@@ -63,6 +64,9 @@
 	def __init__(self, pcls=None):
 		if pcls:
 			dic_to_cls( cls_to_dic(pcls), self )
+	def __repr__(self):
+		if hasattr(self, 'str'):
+			return self.str()
 
 get_typ = lambda targ, typ='p': targ.typ if isinstance(targ, Empty) else typ
 
diff -urN rt_v38/vecs.py rt_v39/vecs.py
--- rt_v38/vecs.py	2018-04-07 23:41:35.000000000 +0900
+++ rt_v39/vecs.py	2018-05-19 17:55:59.000000000 +0900
@@ -30,6 +30,8 @@
 	e.zoom_y = lambda zm: e.zoom( [1,zm,1] )
 	e.zoom_z = lambda zm: e.zoom( [1,1,zm] )
 
+	e.str = lambda : str(e.v3)
+
 	return e
 
 one = new( mt.arr( [v.x1, v.y1, v.z1] ) )