diff --git a/th05/main/boss/render.cpp b/th05/main/boss/render.cpp
index d3cf1810..bbe8b54e 100644
--- a/th05/main/boss/render.cpp
+++ b/th05/main/boss/render.cpp
@@ -58,6 +58,15 @@ extern lineset_t linesets[LINESET_COUNT];
 /// Stage 6 - Shinki
 /// ----------------
 
+#define SHINKI_SPINLINE_MOVE_W (PLAYFIELD_W / 6) /* pixel_t! */
+#define SHINKI_SPINLINE_MOVE_SPEED to_sp(0.25f)
+#define SHINKI_SPINLINE_TOP to_sp(80.0f)
+#define SHINKI_SPINLINE_BOTTOM to_sp(PLAYFIELD_H - 64)
+#define SHINKI_TYPE_D_BG_H 128
+
+#define SHINKI_SPINLINE_MOVE_DURATION \
+	(SHINKI_SPINLINE_MOVE_W * SHINKI_SPINLINE_MOVE_SPEED)
+
 static const int SHINKI_LINESET_COUNT = 2;
 static const int PARTICLES_UNINITIALIZED = (-1 & 0xFF);
 
@@ -70,6 +79,46 @@ static const int SHINKI_LINE_4 = (3 * 6);
 extern unsigned char shinki_bg_linesets_zoomed_out;
 extern int shinki_bg_type_a_particles_alive;
 extern bool shinki_bg_type_b_initialized;
+extern unsigned int shinki_bg_spinline_frames;
+extern bool shinki_bg_type_c_initialized;
+extern bool shinki_bg_type_d_initialized;
+
+#define shinki_spinline_x_and_angle(set, delta) \
+	if(set->radius[SHINKI_LINE_MAIN] > to_sp(96.0f)) { \
+		set->radius[SHINKI_LINE_MAIN] -= 0.125f; \
+	} \
+	if( \
+		(shinki_bg_spinline_frames & ( \
+			(SHINKI_SPINLINE_MOVE_DURATION * 2) - 1) \
+		) < SHINKI_SPINLINE_MOVE_DURATION \
+	) { \
+		set->center[SHINKI_LINE_MAIN].x.v += delta; \
+	} else { \
+		set->center[SHINKI_LINE_MAIN].x.v -= delta; \
+	} \
+	set->angle[SHINKI_LINE_MAIN] += (delta / 2);
+
+#define shinki_spinline_y_formation_top(set, delta, set_i, line_i) \
+	delta = (SHINKI_SPINLINE_TOP - set->center[SHINKI_LINE_MAIN].y); \
+	set_i = 0; \
+	while(set_i < SHINKI_LINESET_COUNT) { \
+		for(line_i = SHINKI_LINE_4; line_i >= 0; line_i--) { \
+			set->center[line_i].y.v += delta; \
+		} \
+		set_i++; \
+		set++; \
+	}
+
+#define shinki_spinline_y_formation_bottom(set, delta, set_i, line_i) \
+	delta = (set->center[SHINKI_LINE_MAIN].y - SHINKI_SPINLINE_BOTTOM); \
+	set_i = 0; \
+	while(set_i < SHINKI_LINESET_COUNT) { \
+		for(line_i = SHINKI_LINE_4; line_i >= 0; line_i--) { \
+			set->center[line_i].y.v -= delta; \
+		} \
+		set_i++; \
+		set++; \
+	}
 
 void near shinki_bg_particles_render(void)
 {
@@ -205,10 +254,10 @@ void pascal near grcg_lineset_line_put(lineset_t near &set, int i)
 	grcg_line(x1, y1, x2, y2);
 }
 
-// Copies lines [0; 17] to lines [1..18].
-void pascal near lineset_forward_copy(lineset_t near &set)
+// Copies lines [0..17] to lines [1..18].
+void pascal near shinki_lineset_forward_copy(lineset_t near &set)
 {
-	for(int i = (LINESET_LINE_COUNT - 2); i > 0; i--) {
+	for(int i = SHINKI_LINE_4; i > 0; i--) {
 		set.center[i] = set.center[i - 1];
 		set.angle[i] = set.angle[i - 1];
 		set.radius[i].v = set.radius[i - 1].v;
@@ -249,7 +298,7 @@ void near shinki_bg_type_a_update_and_render(void)
 	lineset_t near *set = linesets;
 	int i = 0;
 	while(i < SHINKI_LINESET_COUNT) {
-		lineset_forward_copy(*set);
+		shinki_lineset_forward_copy(*set);
 		set->radius[SHINKI_LINE_MAIN] += 4.0f;
 		vector2_at(
 			set->center[SHINKI_LINE_MAIN],
@@ -321,4 +370,152 @@ void near shinki_bg_type_b_update_part1(void)
 		particle++;
 	}
 }
+
+// Particles: Blue, at random X positions, falling down
+// Lines: Spinning and horizontally shifting at both sides of Shinki's wings,
+//        starting near the center of the playfield, moving up to
+//        [SHINKI_SPINLINE_TOP], and then pushed *down* into a vertical
+//        formation, until the set has reached its target velocity.
+void near shinki_bg_type_b_update_and_render(void)
+{
+	// MODDERS: Just fuse into this function.
+	shinki_bg_type_b_update_part1();
+
+	lineset_t near *set;
+	int set_i;
+	subpixel_t delta;
+	int line_i;
+
+	delta = SHINKI_SPINLINE_MOVE_SPEED;
+	set = linesets;
+	set_i = 0;
+	while(set_i < SHINKI_LINESET_COUNT) {
+		shinki_lineset_forward_copy(*set);
+		set->center[SHINKI_LINE_MAIN].y.v += set->velocity_y.v;
+		if(set->velocity_y > to_sp(-14.0f)) {
+			set->velocity_y.v -= (
+				(stage_frame_mod4 == 0) ? to_sp(0.0625f) : to_sp(0.0f)
+			);
+		}
+		shinki_spinline_x_and_angle(set, delta);
+
+		set_i++;
+		set++;
+		delta = -delta;
+	}
+
+	shinki_bg_spinline_frames++;
+
+	set = linesets;
+	if(set->center[SHINKI_LINE_MAIN].y < SHINKI_SPINLINE_TOP) {
+		shinki_spinline_y_formation_top(set, delta, set_i, line_i);
+	}
+
+	shinki_bg_render_blue_particles_and_lines();
+}
+
+void near shinki_bg_type_c_update_part1(void)
+{
+	boss_particle_t near *particle;
+	int i;
+
+	if(!shinki_bg_type_c_initialized) {
+		particle = boss_particles;
+		if(particle->velocity.y < to_sp(0.0f)) {
+			i = 0;
+			while(i < BOSS_PARTICLE_COUNT) {
+				particle->origin.y.set(PLAYFIELD_H + 1.0f);
+				i++;
+				particle++;
+			}
+			shinki_bg_type_c_initialized++;
+		}
+	}
+
+	particle = boss_particles;
+	i = 0;
+	while(i < BOSS_PARTICLE_COUNT) {
+		if(particle->velocity.y.v > to_sp(-10.0f)) {
+			particle->velocity.y.v -= stage_frame_mod2;
+		}
+		i++;
+		particle++;
+	}
+}
+
+// Particles: Blue, keeping their random X positions from type B, rising
+// Lines: Moving back up to [SHINKI_SPINLINE_TOP], starting at the Y velocity
+//        they had from the previous background type. Then, moving down to
+//        [SHINKI_SPINLINE_BOTTOM], and then pushed *up* into a vertical
+//        formation, until the set has reached its target velocity.
+void near shinki_bg_type_c_update_and_render(void)
+{
+	// MODDERS: Just fuse into this function.
+	shinki_bg_type_c_update_part1();
+
+	lineset_t near *set;
+	int set_i;
+	subpixel_t delta;
+	int line_i;
+
+	delta = SHINKI_SPINLINE_MOVE_SPEED;
+	set = linesets;
+	set_i = 0;
+	while(set_i < SHINKI_LINESET_COUNT) {
+		shinki_lineset_forward_copy(*set);
+		set->center[SHINKI_LINE_MAIN].y.v += set->velocity_y.v;
+		if(set->velocity_y < to_sp(14.0f)) {
+			set->velocity_y.v += stage_frame_mod2;
+		}
+		shinki_spinline_x_and_angle(set, delta);
+
+		set_i++;
+		set++;
+		delta = -delta;
+	}
+
+	shinki_bg_spinline_frames++;
+
+	set = linesets;
+	// [velocity_y] is still negative from type B in the beginning. Continue
+	// applying friction until [velocity_y] gets positive again
+	if(set->center[SHINKI_LINE_MAIN].y < SHINKI_SPINLINE_TOP) {
+		shinki_spinline_y_formation_top(set, delta, set_i, line_i);
+	} else if(set->center[SHINKI_LINE_MAIN].y > SHINKI_SPINLINE_BOTTOM) {
+		shinki_spinline_y_formation_bottom(set, delta, set_i, line_i);
+	}
+
+	shinki_bg_render_blue_particles_and_lines();
+}
+
+// Rising "smoke" particles.
+void near shinki_bg_type_d_update(void)
+{
+	boss_particle_t near *particle;
+	int i;
+
+	if(!shinki_bg_type_d_initialized) {
+		particle = boss_particles;
+		i = 0;
+		while(i < BOSS_PARTICLE_COUNT) {
+			particle->origin.y.v = to_sp(PLAYFIELD_H - SHINKI_TYPE_D_BG_H);
+			particle->velocity.y.set(-1.0f);
+			i++;
+			particle++;
+		}
+		shinki_bg_type_d_initialized++;
+	}
+
+	particle = boss_particles;
+	i = 0;
+	while(i < BOSS_PARTICLE_COUNT) {
+		int cel = ((PARTICLE_CELS - 1) - (particle->pos.y.v / to_sp(64.0f)));
+		if(cel < 0) {
+			cel = 0;
+		}
+		particle->patnum = (PAT_PARTICLE + cel);
+		i++;
+		particle++;
+	}
+}
 /// ----------------
diff --git a/th05_main.asm b/th05_main.asm
index 083b1a53..608560b4 100644
--- a/th05_main.asm
+++ b/th05_main.asm
@@ -3533,417 +3533,14 @@ loc_D322:
 yumeko_bg_render	endp
 
 	_shinki_bg_particles_render procdesc c near
-	GRCG_LINESET_LINE_PUT procdesc pascal near \
-		set:near ptr, i:word
-	LINESET_FORWARD_COPY procdesc pascal near \
-		set:near ptr
 	_shinki_bg_type_a_update_and_rend procdesc c near
-	_shinki_bg_type_b_update_part1 procdesc c near
+	_shinki_bg_type_b_update_and_rend procdesc c near
+	_shinki_bg_type_c_update_and_rend procdesc c near
+	_shinki_bg_type_d_update procdesc c near
 main__TEXT	ends
 
 main_0_TEXT	segment	word public 'CODE' use16
 
-; =============== S U B	R O U T	I N E =======================================
-
-; Attributes: bp-based frame
-
-sub_D774	proc near
-
-var_4		= word ptr -4
-var_2		= word ptr -2
-
-		enter	4, 0
-		push	si
-		push	di
-		call	_shinki_bg_type_b_update_part1
-		mov	[bp+var_2], 4
-		mov	si, offset _linesets
-		xor	di, di
-		jmp	short loc_D7E8
-; ---------------------------------------------------------------------------
-
-loc_D789:
-		call	lineset_forward_copy pascal, si
-		mov	ax, [si+lineset_t.LS_velocity_y]
-		add	[si+lineset_t.LS_center.y], ax
-		cmp	[si+lineset_t.LS_velocity_y], (-14 shl 4)
-		jle	short loc_D7AB
-		cmp	_stage_frame_mod4, 0
-		jnz	short loc_D7A6
-		mov	ax, 1
-		jmp	short loc_D7A8
-; ---------------------------------------------------------------------------
-
-loc_D7A6:
-		xor	ax, ax
-
-loc_D7A8:
-		sub	[si+lineset_t.LS_velocity_y], ax
-
-loc_D7AB:
-		cmp	[si+lineset_t.LS_radius], (96 shl 4)
-		jle	short loc_D7B6
-		sub	[si+lineset_t.LS_radius], 2
-
-loc_D7B6:
-		mov	ax, word_21D72
-		and	ax, 511
-		cmp	ax, 256
-		jnb	short loc_D7C8
-		mov	ax, [bp+var_2]
-		add	[si+lineset_t.LS_center.x], ax
-		jmp	short loc_D7CD
-; ---------------------------------------------------------------------------
-
-loc_D7C8:
-		mov	ax, [bp+var_2]
-		sub	[si+lineset_t.LS_center.x], ax
-
-loc_D7CD:
-		mov	ax, [bp+var_2]
-		cwd
-		sub	ax, dx
-		sar	ax, 1
-		add	al, [si+lineset_t.LS_angle]
-		mov	[si+lineset_t.LS_angle], al
-		inc	di
-		add	si, size lineset_t
-		mov	ax, [bp+var_2]
-		neg	ax
-		mov	[bp+var_2], ax
-
-loc_D7E8:
-		cmp	di, 2
-		jl	short loc_D789
-		inc	word_21D72
-		mov	si, offset _linesets
-		cmp	[si+lineset_t.LS_center.y], (80 shl 4)
-		jge	short loc_D82E
-		mov	ax, (80 shl 4)
-		sub	ax, [si+lineset_t.LS_center.y]
-		mov	[bp+var_2], ax
-		xor	di, di
-		jmp	short loc_D829
-; ---------------------------------------------------------------------------
-
-loc_D808:
-		mov	[bp+var_4], (LINESET_LINE_COUNT - 2)
-		jmp	short loc_D81E
-; ---------------------------------------------------------------------------
-
-loc_D80F:
-		mov	bx, [bp+var_4]
-		shl	bx, 2
-		mov	ax, [bp+var_2]
-		add	[bx+si+lineset_t.LS_center.y], ax
-		dec	[bp+var_4]
-
-loc_D81E:
-		cmp	[bp+var_4], 0
-		jge	short loc_D80F
-		inc	di
-		add	si, size lineset_t
-
-loc_D829:
-		cmp	di, 2
-		jl	short loc_D808
-
-loc_D82E:
-		call	_grcg_setmode_rmw_seg1
-		mov	ah, GC_BRG
-		call	_grcg_setcolor_direct_seg1_raw
-		call	_shinki_bg_particles_render
-		call	grcg_lineset_line_put pascal, offset lineset0, 18
-		call	grcg_lineset_line_put pascal, offset lineset0, 12
-		call	grcg_lineset_line_put pascal, offset lineset1, 18
-		call	grcg_lineset_line_put pascal, offset lineset1, 12
-		mov	ah, GC_RG
-		call	_grcg_setcolor_direct_seg1_raw
-		call	grcg_lineset_line_put pascal, offset lineset0, 6
-		call	grcg_lineset_line_put pascal, offset lineset1, 6
-		mov	ah, 0Fh
-		call	_grcg_setcolor_direct_seg1_raw
-		call	grcg_lineset_line_put pascal, offset lineset0, 0
-		call	grcg_lineset_line_put pascal, offset lineset1, 0
-		GRCG_OFF_CLOBBERING dx
-		pop	di
-		pop	si
-		leave
-		retn
-sub_D774	endp
-
-
-; =============== S U B	R O U T	I N E =======================================
-
-; Attributes: bp-based frame
-
-sub_D88D	proc near
-		push	bp
-		mov	bp, sp
-		push	si
-		cmp	byte_21D74, 0
-		jnz	short loc_D8B7
-		mov	si, offset _boss_particles
-		cmp	[si+boss_particle_t.BP_velocity.y], 0
-		jge	short loc_D8B7
-		xor	dx, dx
-		jmp	short loc_D8AE
-; ---------------------------------------------------------------------------
-
-loc_D8A5:
-		mov	[si+boss_particle_t.BP_origin.y], ((PLAYFIELD_H + 1) shl 4)
-		inc	dx
-		add	si, size boss_particle_t
-
-loc_D8AE:
-		cmp	dx, BOSS_PARTICLE_COUNT
-		jl	short loc_D8A5
-		inc	byte_21D74
-
-loc_D8B7:
-		mov	si, offset _boss_particles
-		xor	dx, dx
-		jmp	short loc_D8D1
-; ---------------------------------------------------------------------------
-
-loc_D8BE:
-		cmp	[si+boss_particle_t.BP_velocity.y], (-10 shl 4)
-		jle	short loc_D8CD
-		mov	al, _stage_frame_mod2
-		mov	ah, 0
-		sub	[si+boss_particle_t.BP_velocity.y], ax
-
-loc_D8CD:
-		inc	dx
-		add	si, size boss_particle_t
-
-loc_D8D1:
-		cmp	dx, BOSS_PARTICLE_COUNT
-		jl	short loc_D8BE
-		pop	si
-		pop	bp
-		retn
-sub_D88D	endp
-
-
-; =============== S U B	R O U T	I N E =======================================
-
-; Attributes: bp-based frame
-
-sub_D8D9	proc near
-
-@@line_i		= word ptr -4
-var_2		= word ptr -2
-
-		enter	4, 0
-		push	si
-		push	di
-		call	sub_D88D
-		mov	[bp+var_2], 4
-		mov	si, offset _linesets
-		xor	di, di
-		jmp	short loc_D944
-; ---------------------------------------------------------------------------
-
-loc_D8EE:
-		call	lineset_forward_copy pascal, si
-		mov	ax, [si+lineset_t.LS_velocity_y]
-		add	[si+lineset_t.LS_center.y], ax
-		cmp	[si+lineset_t.LS_velocity_y], (14 shl 4)
-		jge	short loc_D907
-		mov	al, _stage_frame_mod2
-		mov	ah, 0
-		add	[si+lineset_t.LS_velocity_y], ax
-
-loc_D907:
-		cmp	[si+lineset_t.LS_radius], (96 shl 4)
-		jle	short loc_D912
-		sub	[si+lineset_t.LS_radius], 2
-
-loc_D912:
-		mov	ax, word_21D72
-		and	ax, 511
-		cmp	ax, 256
-		jnb	short loc_D924
-		mov	ax, [bp+var_2]
-		add	[si+lineset_t.LS_center.x], ax
-		jmp	short loc_D929
-; ---------------------------------------------------------------------------
-
-loc_D924:
-		mov	ax, [bp+var_2]
-		sub	[si+lineset_t.LS_center.x], ax
-
-loc_D929:
-		mov	ax, [bp+var_2]
-		cwd
-		sub	ax, dx
-		sar	ax, 1
-		add	al, [si+lineset_t.LS_angle]
-		mov	[si+lineset_t.LS_angle], al
-		inc	di
-		add	si, size lineset_t
-		mov	ax, [bp+var_2]
-		neg	ax
-		mov	[bp+var_2], ax
-
-loc_D944:
-		cmp	di, 2
-		jl	short loc_D8EE
-		inc	word_21D72
-		mov	si, offset _linesets
-		cmp	[si+lineset_t.LS_center.y], (80 shl 4)
-		jge	short loc_D98C
-		mov	ax, (80 shl 4)
-		sub	ax, [si+lineset_t.LS_center.y]
-		mov	[bp+var_2], ax
-		xor	di, di
-		jmp	short loc_D985
-; ---------------------------------------------------------------------------
-
-loc_D964:
-		mov	[bp+@@line_i], (LINESET_LINE_COUNT - 2)
-		jmp	short loc_D97A
-; ---------------------------------------------------------------------------
-
-loc_D96B:
-		mov	bx, [bp+@@line_i]
-		shl	bx, 2
-		mov	ax, [bp+var_2]
-		add	[bx+si+lineset_t.LS_center.y], ax
-		dec	[bp+@@line_i]
-
-loc_D97A:
-		cmp	[bp+@@line_i], 0
-		jge	short loc_D96B
-		inc	di
-		add	si, size lineset_t
-
-loc_D985:
-		cmp	di, 2
-		jl	short loc_D964
-		jmp	short loc_D9C6
-; ---------------------------------------------------------------------------
-
-loc_D98C:
-		cmp	[si+lineset_t.LS_center.y], (304 shl 4)
-		jle	short loc_D9C6
-		mov	ax, [si+lineset_t.LS_center.y]
-		add	ax, (-304 shl 4)
-		mov	[bp+var_2], ax
-		xor	di, di
-		jmp	short loc_D9C1
-; ---------------------------------------------------------------------------
-
-loc_D9A0:
-		mov	[bp+@@line_i], (LINESET_LINE_COUNT - 2)
-		jmp	short loc_D9B6
-; ---------------------------------------------------------------------------
-
-loc_D9A7:
-		mov	bx, [bp+@@line_i]
-		shl	bx, 2
-		mov	ax, [bp+var_2]
-		sub	[bx+si+lineset_t.LS_center.y], ax
-		dec	[bp+@@line_i]
-
-loc_D9B6:
-		cmp	[bp+@@line_i], 0
-		jge	short loc_D9A7
-		inc	di
-		add	si, size lineset_t
-
-loc_D9C1:
-		cmp	di, 2
-		jl	short loc_D9A0
-
-loc_D9C6:
-		call	_grcg_setmode_rmw_seg1
-		mov	ah, GC_BRG
-		call	_grcg_setcolor_direct_seg1_raw
-		call	_shinki_bg_particles_render
-		call	grcg_lineset_line_put pascal, offset lineset0, 18
-		call	grcg_lineset_line_put pascal, offset lineset0, 12
-		call	grcg_lineset_line_put pascal, offset lineset1, 18
-		call	grcg_lineset_line_put pascal, offset lineset1, 12
-		mov	ah, GC_RG
-		call	_grcg_setcolor_direct_seg1_raw
-		call	grcg_lineset_line_put pascal, offset lineset0, 6
-		call	grcg_lineset_line_put pascal, offset lineset1, 6
-		mov	ah, 0Fh
-		call	_grcg_setcolor_direct_seg1_raw
-		call	grcg_lineset_line_put pascal, offset lineset0, 0
-		call	grcg_lineset_line_put pascal, offset lineset1, 0
-		GRCG_OFF_CLOBBERING dx
-		pop	di
-		pop	si
-		leave
-		retn
-sub_D8D9	endp
-
-
-; =============== S U B	R O U T	I N E =======================================
-
-; Attributes: bp-based frame
-
-sub_DA25	proc near
-
-@@cel		= word ptr -2
-
-		enter	2, 0
-		push	si
-		cmp	byte_21D75, 0
-		jnz	short loc_DA4F
-		mov	si, offset _boss_particles
-		xor	cx, cx
-		jmp	short loc_DA46
-; ---------------------------------------------------------------------------
-
-loc_DA38:
-		mov	[si+boss_particle_t.BP_origin.y], (240 shl 4)
-		mov	[si+boss_particle_t.BP_velocity.y], (-1 shl 4)
-		inc	cx
-		add	si, size boss_particle_t
-
-loc_DA46:
-		cmp	cx, BOSS_PARTICLE_COUNT
-		jl	short loc_DA38
-		inc	byte_21D75
-
-loc_DA4F:
-		mov	si, offset _boss_particles
-		xor	cx, cx
-		jmp	short loc_DA7E
-; ---------------------------------------------------------------------------
-
-loc_DA56:
-		mov	ax, [si+boss_particle_t.BP_pos.y]
-		mov	bx, (64 shl 4)
-		cwd
-		idiv	bx
-		mov	dx, (PARTICLE_CELS - 1)
-		sub	dx, ax
-		mov	[bp+@@cel], dx
-		cmp	[bp+@@cel], 0
-		jge	short loc_DA72
-		mov	[bp+@@cel], 0
-
-loc_DA72:
-		mov	al, byte ptr [bp+@@cel]
-		add	al, PAT_PARTICLE
-		mov	[si+boss_particle_t.BP_patnum], al
-		inc	cx
-		add	si, size boss_particle_t
-
-loc_DA7E:
-		cmp	cx, BOSS_PARTICLE_COUNT
-		jl	short loc_DA56
-		pop	si
-		leave
-		retn
-sub_DA25	endp
-
-
 ; =============== S U B	R O U T	I N E =======================================
 
 ; Attributes: bp-based frame
@@ -4003,7 +3600,7 @@ loc_DAEC:
 		cmp	_boss_phase, 8
 		jnb	short loc_DAFB
 		call	sub_E92E
-		call	sub_D774
+		call	_shinki_bg_type_b_update_and_rend
 		leave
 		retn
 ; ---------------------------------------------------------------------------
@@ -4012,7 +3609,7 @@ loc_DAFB:
 		cmp	_boss_phase, 0Ch
 		jnb	short loc_DB0A
 		call	sub_E92E
-		call	sub_D8D9
+		call	_shinki_bg_type_c_update_and_rend
 		leave
 		retn
 ; ---------------------------------------------------------------------------
@@ -4020,7 +3617,7 @@ loc_DAFB:
 loc_DB0A:
 		call	cdg_put_noalpha_8 pascal, large (32 shl 16) or 256, 17
 		call	sub_E950
-		call	sub_DA25
+		call	_shinki_bg_type_d_update
 		call	grcg_setcolor pascal, (GC_RMW shl 16) + 6
 		call	_shinki_bg_particles_render
 		GRCG_OFF_CLOBBERING dx
@@ -26970,15 +26567,17 @@ byte_21762	db 0
 include th04/sprites/pointnum.asp
 include th05/formats/bb_playchar[data].asm
 public _shinki_bg_linesets_zoomed_out, _shinki_bg_type_a_particles_alive
-public _shinki_bg_type_b_initialized
+public _shinki_bg_type_b_initialized, _shinki_bg_spinline_frames
+public _shinki_bg_type_c_initialized
+public _shinki_bg_type_d_initialized
 _shinki_bg_linesets_zoomed_out	db 0
 		db 0
 _shinki_bg_type_a_particles_alive	dw (-1 and 255)
 _shinki_bg_type_b_initialized	db 0
 		db 0
-word_21D72	dw 0
-byte_21D74	db 0
-byte_21D75	db 0
+_shinki_bg_spinline_frames	dw 0
+_shinki_bg_type_c_initialized	db 0
+_shinki_bg_type_d_initialized	db 0
 byte_21D76	db 0
 		db 0
 include th04/main/player/shot_laser[data].asm