fix: skybox crash for mask shop (#3427)

2 files changed, 14 insertions, 3 deletions

diff --git a/soh/src/code/z_vr_box.c b/soh/src/code/z_vr_box.c
index b77c3d869..ff2622187 100644
--- a/soh/src/code/z_vr_box.c
+++ b/soh/src/code/z_vr_box.c
@@ -417,7 +417,12 @@ void func_800AEFC8(SkyboxContext* skyboxCtx, s16 skyboxId) {
     s32 j;
     s32 phi_s3 = 0;
 
-    if (skyboxId == SKYBOX_BAZAAR || (skyboxId > SKYBOX_HOUSE_KAKARIKO && skyboxId <= SKYBOX_BOMBCHU_SHOP)) {
+    //! @bug All shops only provide 2 faces for their sky box. Mask shop is missing from the condition
+    // meaning that the Mask shop will calculate 4 faces
+    // This effect is not noticed as the faces are behind the camera, but will cause a crash in SoH.
+    // SOH General: We have added the Mask shop to this check so only the 2 expected faces are calculated.
+    if (skyboxId == SKYBOX_BAZAAR || skyboxId == SKYBOX_HAPPY_MASK_SHOP ||
+        (skyboxId >= SKYBOX_KOKIRI_SHOP && skyboxId <= SKYBOX_BOMBCHU_SHOP)) {
         for (j = 0, i = 0; i < 2; i++, j += 2) {
             phi_s3 = func_800ADBB0(skyboxCtx, skyboxCtx->roomVtx, phi_s3, D_8012AEBC[i].unk_0, D_8012AEBC[i].unk_4,
                                    D_8012AEBC[i].unk_8, D_8012AEBC[i].unk_C, D_8012AEBC[i].unk_10, i, j);
diff --git a/soh/src/code/z_vr_box_draw.c b/soh/src/code/z_vr_box_draw.c
index 8eb97573e..5b4867121 100644
--- a/soh/src/code/z_vr_box_draw.c
+++ b/soh/src/code/z_vr_box_draw.c
@@ -59,8 +59,14 @@ void SkyboxDraw_Draw(SkyboxContext* skyboxCtx, GraphicsContext* gfxCtx, s16 skyb
         gSPDisplayList(POLY_OPA_DISP++, skyboxCtx->dListBuf[2]);
         gSPDisplayList(POLY_OPA_DISP++, skyboxCtx->dListBuf[3]);
 
-        if (skyboxId != SKYBOX_BAZAAR) {
-            if (skyboxId <= SKYBOX_HOUSE_KAKARIKO || skyboxId > SKYBOX_BOMBCHU_SHOP) {
+        //! @bug All shops only provide 2 faces for their sky box. Mask shop is missing from the condition
+        // meaning that the Mask shop will render the previously loaded sky box values, or uninitialized data.
+        // This effect is not noticed as the faces are behind the camera, but will cause a crash in SoH.
+        // SOH General: We have added the Mask shop to this check so only the 2 expected faces are rendered.
+        if (skyboxId != SKYBOX_BAZAAR && skyboxId != SKYBOX_HAPPY_MASK_SHOP) {
+            if (skyboxId < SKYBOX_KOKIRI_SHOP || skyboxId > SKYBOX_BOMBCHU_SHOP) {
+                // Skip remaining faces for most shop skyboxes
+
                 gDPPipeSync(POLY_OPA_DISP++);
                 gDPLoadTLUT_pal256(POLY_OPA_DISP++, skyboxCtx->palettes[2]);
                 gSPDisplayList(POLY_OPA_DISP++, skyboxCtx->dListBuf[4]);