diff --git a/decompiler/config/all-types.gc b/decompiler/config/all-types.gc
index b70d7b51db..f6beb0adce 100644
--- a/decompiler/config/all-types.gc
+++ b/decompiler/config/all-types.gc
@@ -17741,7 +17741,7 @@
   (:methods
     (water-vol-idle () none 20) ;; state
     (water-vol-startup () none 21) ;; state
-    (TODO-RENAME-22 (_type_) none 22)
+    (TODO-RENAME-22 (_type_) ripple-wave-set 22)
     (dummy-23 () none 23)
     (dummy-24 () none 24)
     (TODO-RENAME-25 (_type_) quaternion 25)
@@ -33250,41 +33250,18 @@
 
 ;; - Types
 
-; (deftype mud (water-anim)
-;   ()
-;   :method-count-assert 30
-;   :size-assert         #xdc
-;   :flag-assert         #x1e007000dc
-;   ;;  not enough basic ops
-;   (:methods
-;     (dummy-9 () none 9)
-;     (dummy-10 () none 10)
-;     (dummy-11 () none 11)
-;     (dummy-12 () none 12)
-;     (dummy-13 () none 13)
-;     (dummy-14 () none 14)
-;     (dummy-15 () none 15)
-;     (dummy-16 () none 16)
-;     (dummy-17 () none 17)
-;     (dummy-18 () none 18)
-;     (dummy-19 () none 19)
-;     (dummy-20 () none 20)
-;     (dummy-21 () none 21)
-;     (dummy-22 () none 22)
-;     (dummy-23 () none 23)
-;     (dummy-24 () none 24)
-;     (dummy-25 () none 25)
-;     (dummy-26 () none 26)
-;     (dummy-27 () none 27)
-;     (dummy-28 () none 28)
-;     (dummy-29 () none 29)
-;     )
-;   )
+(deftype mud (water-anim)
+  ()
+  :method-count-assert 30
+  :heap-base           #x70
+  :size-assert         #xdc
+  :flag-assert         #x1e007000dc
+  )
 
 ;; - Unknowns
 
-;;(define-extern ripple-for-mud object) ;; unknown type
-;;(define-extern ripple-for-small-mud object) ;; unknown type
+(define-extern ripple-for-mud ripple-wave-set) ;; unknown type
+(define-extern ripple-for-small-mud ripple-wave-set) ;; unknown type
 
 
 ;; ----------------------
diff --git a/decompiler/config/jak1_ntsc_black_label/label_types.jsonc b/decompiler/config/jak1_ntsc_black_label/label_types.jsonc
index 4227027ff8..171c0678c4 100644
--- a/decompiler/config/jak1_ntsc_black_label/label_types.jsonc
+++ b/decompiler/config/jak1_ntsc_black_label/label_types.jsonc
@@ -1486,6 +1486,12 @@
     ["L165", "float", true]
   ],
 
+  "mud": [
+    ["L8", "ripple-wave-set", true],
+    ["L9", "ripple-wave-set", true],
+    ["L10", "float", true]
+  ],
+
   // please do not add things after this entry! git is dumb.
   "object-file-that-doesnt-actually-exist-and-i-just-put-this-here-to-prevent-merge-conflicts-with-this-file": []
 }
diff --git a/decompiler/config/jak1_ntsc_black_label/type_casts.jsonc b/decompiler/config/jak1_ntsc_black_label/type_casts.jsonc
index 85335c425a..e16422c779 100644
--- a/decompiler/config/jak1_ntsc_black_label/type_casts.jsonc
+++ b/decompiler/config/jak1_ntsc_black_label/type_casts.jsonc
@@ -1851,5 +1851,9 @@
     [5, "v1", "process-mask"]
   ],
 
+  "(method 22 mud)": [
+    [[37, 41], "v1", "ripple-control"]
+  ],
+
   "placeholder-do-not-add-below": []
 }
diff --git a/goal_src/engine/gfx/water/water-h.gc b/goal_src/engine/gfx/water/water-h.gc
index 09c56e6cd9..4cb008d0de 100644
--- a/goal_src/engine/gfx/water/water-h.gc
+++ b/goal_src/engine/gfx/water/water-h.gc
@@ -101,7 +101,7 @@
   (:methods
     (water-vol-idle () none 20) ;; state
     (water-vol-startup () none 21) ;; state
-    (TODO-RENAME-22 (_type_) none 22)
+    (TODO-RENAME-22 (_type_) ripple-wave-set 22)
     (dummy-23 () none 23)
     (dummy-24 () none 24)
     (TODO-RENAME-25 (_type_) quaternion 25)
diff --git a/goal_src/levels/common/water-anim.gc b/goal_src/levels/common/water-anim.gc
index 7955d33350..0fa04b5a75 100644
--- a/goal_src/levels/common/water-anim.gc
+++ b/goal_src/levels/common/water-anim.gc
@@ -1926,7 +1926,7 @@
   )
 
 ;; definition for method 22 of type water-anim
-;; INFO: Return type mismatch int vs none.
+;; INFO: Return type mismatch int vs ripple-wave-set.
 (defmethod TODO-RENAME-22 water-anim ((obj water-anim))
   (with-pp
    (let ((s5-0 (-> obj look)))
@@ -1980,7 +1980,6 @@
       )
      )
     )
-   (ja-post)
-   (none)
+   (the-as ripple-wave-set (ja-post))
    )
   )
diff --git a/goal_src/levels/misty/mud.gc b/goal_src/levels/misty/mud.gc
index ebf980b9f4..9053353d7f 100644
--- a/goal_src/levels/misty/mud.gc
+++ b/goal_src/levels/misty/mud.gc
@@ -5,3 +5,100 @@
 ;; name in dgo: mud
 ;; dgos: L1, MIS
 
+;; definition of type mud
+(deftype mud (water-anim)
+  ()
+  :heap-base #x70
+  :method-count-assert 30
+  :size-assert         #xdc
+  :flag-assert         #x1e007000dc
+  )
+
+;; definition for symbol ripple-for-mud, type ripple-wave-set
+(define
+  ripple-for-mud
+  (new 'static 'ripple-wave-set
+   :count 3
+   :converted #f
+   :normal-scale 1.0
+   :wave
+   (new 'static 'inline-array ripple-wave 4
+    (new 'static 'ripple-wave :scale 40.0 :xdiv 1 :speed 1.5)
+    (new 'static 'ripple-wave :scale 40.0 :xdiv -1 :zdiv 1 :speed 1.5)
+    (new 'static 'ripple-wave :scale 20.0 :xdiv 5 :zdiv 3 :speed 0.75)
+    (new 'static 'ripple-wave)
+    )
+   )
+  )
+
+;; definition for symbol ripple-for-small-mud, type ripple-wave-set
+(define
+  ripple-for-small-mud
+  (new 'static 'ripple-wave-set
+   :count 3
+   :converted #f
+   :normal-scale 1.0
+   :wave
+   (new 'static 'inline-array ripple-wave 4
+    (new 'static 'ripple-wave :scale 20.0 :xdiv 2 :speed 0.5)
+    (new 'static 'ripple-wave :scale 20.0 :xdiv -2 :zdiv 2 :speed 0.5)
+    (new 'static 'ripple-wave :scale 20.0 :xdiv 5 :zdiv 3 :speed 0.75)
+    (new 'static 'ripple-wave)
+    )
+   )
+  )
+
+;; definition for method 22 of type mud
+(defmethod TODO-RENAME-22 mud ((obj mud))
+  (let ((t9-0 (method-of-type water-anim TODO-RENAME-22)))
+   (t9-0 obj)
+   )
+  (set! (-> obj flags) (logand -8388609 (-> obj flags)))
+  (set! (-> obj flags) (logior #x40000 (-> obj flags)))
+  (let ((gp-0 (new 'process 'ripple-control)))
+   (set! (-> obj draw ripple) gp-0)
+   (set! (-> gp-0 global-scale) 3072.0)
+   (set! (-> gp-0 waveform) ripple-for-mud)
+   (let
+    ((v1-9
+      (the-as
+       object
+       ((method-of-type res-lump get-property-data)
+        (-> obj entity)
+        'water-anim-fade-dist
+        'interp
+        -1000000000.0
+        (the-as pointer #f)
+        (the-as (pointer res-tag) #f)
+        *res-static-buf*
+        )
+       )
+      )
+     )
+    (when (the-as pointer v1-9)
+     (set!
+      (-> gp-0 close-fade-dist)
+      (-> (the-as ripple-control v1-9) global-scale)
+      )
+     (set!
+      (-> gp-0 far-fade-dist)
+      (-> (the-as ripple-control v1-9) last-frame-scale)
+      )
+     )
+    )
+   (case (-> obj look) 
+    ((21 25 29)
+      (set! (-> gp-0 close-fade-dist) 4096000000.0)
+      (set! (-> gp-0 far-fade-dist) 8192000000.0)
+      )
+    )
+   (case (-> obj look) 
+    ((22 25 24 27 26 31)
+      (let ((v0-3 ripple-for-small-mud))
+       (set! (-> gp-0 waveform) v0-3)
+       v0-3
+       )
+      )
+    )
+   )
+  )
diff --git a/test/decompiler/reference/engine/gfx/water/water-h_REF.gc b/test/decompiler/reference/engine/gfx/water/water-h_REF.gc
index a81318caa8..c3b1627885 100644
--- a/test/decompiler/reference/engine/gfx/water/water-h_REF.gc
+++ b/test/decompiler/reference/engine/gfx/water/water-h_REF.gc
@@ -151,7 +151,7 @@
   (:methods
     (water-vol-idle () none 20)
     (water-vol-startup () none 21)
-    (TODO-RENAME-22 (_type_) none 22)
+    (TODO-RENAME-22 (_type_) ripple-wave-set 22)
     (dummy-23 () none 23)
     (dummy-24 () none 24)
     (TODO-RENAME-25 (_type_) quaternion 25)
diff --git a/test/decompiler/reference/levels/common/water-anim_REF.gc b/test/decompiler/reference/levels/common/water-anim_REF.gc
index 6c584bc949..cb32f8b9ea 100644
--- a/test/decompiler/reference/levels/common/water-anim_REF.gc
+++ b/test/decompiler/reference/levels/common/water-anim_REF.gc
@@ -1941,7 +1941,7 @@
   )
 
 ;; definition for method 22 of type water-anim
-;; INFO: Return type mismatch int vs none.
+;; INFO: Return type mismatch int vs ripple-wave-set.
 (defmethod TODO-RENAME-22 water-anim ((obj water-anim))
   (with-pp
    (let ((s5-0 (-> obj look)))
@@ -1995,7 +1995,6 @@
       )
      )
     )
-   (ja-post)
-   (none)
+   (the-as ripple-wave-set (ja-post))
    )
   )
diff --git a/test/decompiler/reference/levels/misty/mud_REF.gc b/test/decompiler/reference/levels/misty/mud_REF.gc
new file mode 100644
index 0000000000..341536e634
--- /dev/null
+++ b/test/decompiler/reference/levels/misty/mud_REF.gc
@@ -0,0 +1,112 @@
+;;-*-Lisp-*-
+(in-package goal)
+
+;; definition of type mud
+(deftype mud (water-anim)
+  ()
+  :heap-base #x70
+  :method-count-assert 30
+  :size-assert         #xdc
+  :flag-assert         #x1e007000dc
+  )
+
+;; definition for method 3 of type mud
+(defmethod inspect mud ((obj mud))
+  (let ((t9-0 (method-of-type water-anim inspect)))
+   (t9-0 obj)
+   )
+  obj
+  )
+
+;; definition for symbol ripple-for-mud, type ripple-wave-set
+(define
+  ripple-for-mud
+  (new 'static 'ripple-wave-set
+   :count 3
+   :converted #f
+   :normal-scale 1.0
+   :wave
+   (new 'static 'inline-array ripple-wave 4
+    (new 'static 'ripple-wave :scale 40.0 :xdiv 1 :speed 1.5)
+    (new 'static 'ripple-wave :scale 40.0 :xdiv -1 :zdiv 1 :speed 1.5)
+    (new 'static 'ripple-wave :scale 20.0 :xdiv 5 :zdiv 3 :speed 0.75)
+    (new 'static 'ripple-wave)
+    )
+   )
+  )
+
+;; definition for symbol ripple-for-small-mud, type ripple-wave-set
+(define
+  ripple-for-small-mud
+  (new 'static 'ripple-wave-set
+   :count 3
+   :converted #f
+   :normal-scale 1.0
+   :wave
+   (new 'static 'inline-array ripple-wave 4
+    (new 'static 'ripple-wave :scale 20.0 :xdiv 2 :speed 0.5)
+    (new 'static 'ripple-wave :scale 20.0 :xdiv -2 :zdiv 2 :speed 0.5)
+    (new 'static 'ripple-wave :scale 20.0 :xdiv 5 :zdiv 3 :speed 0.75)
+    (new 'static 'ripple-wave)
+    )
+   )
+  )
+
+;; definition for method 22 of type mud
+(defmethod TODO-RENAME-22 mud ((obj mud))
+  (let ((t9-0 (method-of-type water-anim TODO-RENAME-22)))
+   (t9-0 obj)
+   )
+  (set! (-> obj flags) (logand -8388609 (-> obj flags)))
+  (set! (-> obj flags) (logior #x40000 (-> obj flags)))
+  (let ((gp-0 (new 'process 'ripple-control)))
+   (set! (-> obj draw ripple) gp-0)
+   (set! (-> gp-0 global-scale) 3072.0)
+   (set! (-> gp-0 waveform) ripple-for-mud)
+   (let
+    ((v1-9
+      (the-as
+       object
+       ((method-of-type res-lump get-property-data)
+        (-> obj entity)
+        'water-anim-fade-dist
+        'interp
+        -1000000000.0
+        (the-as pointer #f)
+        (the-as (pointer res-tag) #f)
+        *res-static-buf*
+        )
+       )
+      )
+     )
+    (when (the-as pointer v1-9)
+     (set!
+      (-> gp-0 close-fade-dist)
+      (-> (the-as ripple-control v1-9) global-scale)
+      )
+     (set!
+      (-> gp-0 far-fade-dist)
+      (-> (the-as ripple-control v1-9) last-frame-scale)
+      )
+     )
+    )
+   (case (-> obj look) 
+    ((21 25 29)
+      (set! (-> gp-0 close-fade-dist) 4096000000.0)
+      (set! (-> gp-0 far-fade-dist) 8192000000.0)
+      )
+    )
+   (case (-> obj look) 
+    ((22 25 24 27 26 31)
+      (let ((v0-3 ripple-for-small-mud))
+       (set! (-> gp-0 waveform) v0-3)
+       v0-3
+       )
+      )
+    )
+   )
+  )
+
+
+
+
diff --git a/test/offline/offline_test_main.cpp b/test/offline/offline_test_main.cpp
index 3d6acd37e6..e566af7ce8 100644
--- a/test/offline/offline_test_main.cpp
+++ b/test/offline/offline_test_main.cpp
@@ -268,7 +268,7 @@ class OfflineDecompilation : public ::testing::Test {
     config->generate_symbol_definition_map = false;
 
     std::vector<std::string> dgos = {"CGO/KERNEL.CGO", "CGO/ENGINE.CGO", "CGO/GAME.CGO",
-                                     "DGO/BEA.DGO"};
+                                     "DGO/BEA.DGO", "CGO/L1.CGO"};
     std::vector<std::string> dgo_paths;
     if (g_iso_data_path.empty()) {
       for (auto& x : dgos) {