diff --git a/config/rel_slices.yml b/config/rel_slices.yml
index 7ddc0392..bbeecd51 100644
--- a/config/rel_slices.yml
+++ b/config/rel_slices.yml
@@ -20,4 +20,6 @@ m_room_type/mRmTp_FtrItemNo2FtrIdx.c:
 # zurumode/zurumode.c:
     # .text: [0x8040eb38, 0x8040f008]
     # .bss: [0x812f9670, 0x812f9680]
-    # .data: [0x8065F9F0, 0x8065FA20]
\ No newline at end of file
+    # .data: [0x8065F9F0, 0x8065FA20]
+sys_vimgr.c:
+    .text: [0x803703F8, 0x80370418]
\ No newline at end of file
diff --git a/include/dolphin/vi.h b/include/dolphin/vi.h
new file mode 100644
index 00000000..f6837a20
--- /dev/null
+++ b/include/dolphin/vi.h
@@ -0,0 +1,8 @@
+#ifndef VI_H
+#define VI_H
+
+#include "types.h"
+
+void VISetBlack(BOOL);
+
+#endif
\ No newline at end of file
diff --git a/include/m_lib.h b/include/m_lib.h
index 4f83d177..c325d33e 100644
--- a/include/m_lib.h
+++ b/include/m_lib.h
@@ -61,6 +61,6 @@ void _Game_play_isPause(u32 //IDK);
 //Unsure
 //?? check_percent_abs();
 //?? get_percent_forAccelBrake();
-//?? Game_play_Projection_Trans();
-//?? get_percent();
+void Game_play_Projection_Trans(game_play*, Vec3f*, Vec3f);
+f32 get_percent(s32, s32, s32);
 #endif
\ No newline at end of file
diff --git a/include/sys_vimgr.h b/include/sys_vimgr.h
new file mode 100644
index 00000000..6680ef69
--- /dev/null
+++ b/include/sys_vimgr.h
@@ -0,0 +1,9 @@
+#ifndef SYS_VIMGR_H
+#define SYS_VIMGR_H
+
+#include "types.h"
+#include "dolphin/vi.h"
+
+void viBlack(BOOL);
+
+#endif
\ No newline at end of file
diff --git a/rel/m_lib.c b/rel/m_lib.c
index 05dbbfd2..3ef2056d 100644
--- a/rel/m_lib.c
+++ b/rel/m_lib.c
@@ -1,5 +1,7 @@
 #include "m_lib.h"
 
+
+
 void mem_copy(u8* arg0, u8* arg1, u32 arg2) {
     while (arg2 != 0) {
         *arg0 = *arg1;
@@ -331,3 +333,39 @@ u32 none_proc1(void){
 void none_proc2(void){
     //stub
 }
+
+// f32 check_percent_abs(s32 arg0, f32 arg8, f32 arg9, f32 argA, f32 argB)
+// f32 get_percent_forAccelBrake(f32 arg8, f32 arg9, f32 argA, f32 argB, f32 argC)
+
+
+void Game_play_Projection_Trans(game_play* play, Vec3f* src, Vec3f* dest) {
+    f32 w;
+
+    Matrix_mult(&play->unk_200C, 0);
+    Matrix_Position(src, dest);
+    w = play->unk_200C.ww + (
+          (play->unk_200C.wx * src->x) 
+        + (play->unk_200C.wy * src->y) 
+        + (play->unk_200C.wz * src->z));
+    dest->x = 160.0f + ((dest->x / w) * 160.0f);
+    dest->y = 120.0f - ((dest->y / w) * 120.0f);
+}
+
+f32 get_percent(s32 arg0, s32 arg1, s32 arg2) {
+    f32 temp_f0;
+    f32 var_f2;
+
+    var_f2 = 1.0f;
+    if (arg2 < arg1) {
+        var_f2 = 0.0f;
+    } else if (arg2 < arg0) {
+        temp_f0 = (f32) (arg0 - arg1);
+        if (temp_f0 != 0.0f) {
+            var_f2 = (f32) (arg2 - arg1) / temp_f0;
+            if (var_f2 > 1.0f) {
+                var_f2 = 1.0f;
+            }
+        }
+    }
+    return var_f2;
+}
\ No newline at end of file
diff --git a/rel/sys_vimgr.c b/rel/sys_vimgr.c
new file mode 100644
index 00000000..3b923fc3
--- /dev/null
+++ b/rel/sys_vimgr.c
@@ -0,0 +1,5 @@
+#include "sys_vimgr.h"
+
+void viBlack(BOOL black){
+    VISetBlack(black);
+}
\ No newline at end of file