Fix Time System BG color tinting and overlay clearing bugs

- Fixed: BG color resetting to untinted value on screen transitions (InitColorLoad2).
- Fixed: Addressing mode error in ColorSubEffect causing incorrect tinting.
- Fixed: Active overlays being cleared when hour advances due to static table lookup and incomplete logic in Overworld_LoadBGColorAndSubscreenOverlay.
- Updated handoff documentation with resolution details.

Overworld/ZSCustomOverworld.asm

@@ -3671,7 +3671,8 @@ Overworld_LoadBGColorAndSubscreenOverlay:
         
     .notMire
 
-    JSL.l ReadOverlayArray
+    LDA.b $8C ; Use current active overlay instead of reading from static table
+    ; JSL.l ReadOverlayArray
 
     ; Check for misery mire.
     CMP.w #$009F : BNE .notRain
@@ -3693,6 +3694,11 @@ Overworld_LoadBGColorAndSubscreenOverlay:
             
             ; Check for DW Death mountain. (not turtle rock?).
             CMP.w #$009C : BEQ .setCustomFixedColor
+            
+            ; Safety check: If we have a valid overlay ID (not FF) that wasn't caught above
+            ; (e.g. Canopy $9E, Fog $97), preserve it with default fixed colors instead of disabling.
+            CMP.w #$00FF : BNE .noCustomFixedColor
+
                 SEP #$30 ; Set A, X, and Y in 8bit mode.
 
                 ; Don't set the subscreen during a warp to hide the transparent
@@ -3723,7 +3729,7 @@ Overworld_LoadBGColorAndSubscreenOverlay:
         LDA.b $E2 : STA.b $E0
             
         ; Just because I need a bit more space.
-        JSL.l ReadOverlayArray
+        LDA.b $8C ; JSL.l ReadOverlayArray
             
         ; Are we at Hyrule Castle or Pyramid of Power?
         CMP.w #$0096 : BNE .subscreenOnAndReturn
@@ -3734,7 +3740,8 @@ Overworld_LoadBGColorAndSubscreenOverlay:
     .BRANCH_11
     
     ; Check for the pyramid BG.
-    JSL.l ReadOverlayArray : CMP.w #$0096 : BNE .subscreenOnAndReturn
+    LDA.b $8C ; JSL.l ReadOverlayArray 
+    CMP.w #$0096 : BNE .subscreenOnAndReturn
         ; Synchronize Y scrolls on BG0 and BG1. Same for X scrolls.
         LDA.b $E8 : STA.b $E6
         LDA.b $E2 : STA.b $E0
@@ -3949,13 +3956,8 @@ InitColorLoad2:
     .storeColor
 
     ; Set transparent color.
-    STA.l $7EC300
-    STA.l $7EC340 ; Set transparent color.
-
-    ; TODO: Based on the conditions as explained above, double check that this is
-    ; not needed for any of them.
-    ;STA.l $7EC500
-    ;STA.l $7EC540
+    STA.l $7EE018 ; Set temp color for tinting
+    JSL Oracle_BackgroundFix ; Apply tint and write to buffers
 
     INC.b $15
 

Overworld/time_system.asm

@@ -387,22 +387,22 @@ ColorSubEffect:
   AND #$00FF : TAX
 
   ; Subtract amount to blue field based on a table
-  LDA.l !SubPalColor : AND #$7C00 : STA !BlueVal
-  SEC : SBC.l .blue, X : STA !TempPalColor
+  LDA.l !SubPalColor : AND #$7C00 : STA.l !BlueVal
+  SEC : SBC.l .blue, X : STA.l !TempPalColor
 
   ; mask out everything except the blue bits
-  AND #$7C00 : CMP !TempPalColor : BEQ .no_blue_sign_change ; overflow ?
-    LDA !SmallestBlue
+  AND #$7C00 : CMP.l !TempPalColor : BEQ .no_blue_sign_change ; overflow ?
+    LDA.l !SmallestBlue
   .no_blue_sign_change
   STA.l !BlueVal
 
   ; Subtract amount to green field based on a table
-  LDA !SubPalColor : AND #$03E0 : STA !GreenVal
+  LDA.l !SubPalColor : AND #$03E0 : STA.l !GreenVal
   SEC : SBC.l .green, X : STA.l !TempPalColor
 
   ; Mask out everything except the green bits
-  AND #$03E0 : CMP !TempPalColor : BEQ .no_green_sign_change ; overflow ?
-    LDA !SmallestGreen
+  AND #$03E0 : CMP.l !TempPalColor : BEQ .no_green_sign_change ; overflow ?
+    LDA.l !SmallestGreen
   .no_green_sign_change
   STA.l !GreenVal
 
@@ -411,8 +411,8 @@ ColorSubEffect:
   SEC : SBC.l .red, X : STA.l !TempPalColor
 
   ; mask out everything except the red bits
-  AND #$001F : CMP !TempPalColor : BEQ .no_red_sign_change ; overflow ?
-    LDA !SmallestRed
+  AND #$001F : CMP.l !TempPalColor : BEQ .no_red_sign_change ; overflow ?
+    LDA.l !SmallestRed
   .no_red_sign_change
   STA.l !RedVal