diff --git a/common/custom_data/Tfrag3Data.h b/common/custom_data/Tfrag3Data.h
index a87f046b3..1ea169d75 100644
--- a/common/custom_data/Tfrag3Data.h
+++ b/common/custom_data/Tfrag3Data.h
@@ -73,7 +73,7 @@ struct MemoryUsageTracker {
   void add(MemoryUsageCategory category, u32 size_bytes) { data[category] += size_bytes; }
 };
 
-constexpr int TFRAG3_VERSION = 32;
+constexpr int TFRAG3_VERSION = 33;
 
 // These vertices should be uploaded to the GPU at load time and don't change
 struct PreloadedVertex {
diff --git a/decompiler/level_extractor/MercData.h b/decompiler/level_extractor/MercData.h
index 5e71bb908..5597ffff0 100644
--- a/decompiler/level_extractor/MercData.h
+++ b/decompiler/level_extractor/MercData.h
@@ -181,7 +181,8 @@ struct MercExtraInfo {
 };
 
 constexpr int kTextureScrollEffectBit = 1;
-constexpr int kRippleEffectBit = 4;  // true in jak 1 and jak 2
+constexpr int kTransEffectBitJak1 = 2;  // so far only confirmed for jak 1
+constexpr int kRippleEffectBit = 4;     // true in jak 1 and jak 2
 
 struct MercEffect {
   //((frag-geo         merc-fragment          :offset-assert 0) ;; ?
diff --git a/decompiler/level_extractor/extract_merc.cpp b/decompiler/level_extractor/extract_merc.cpp
index cc013cf9d..ee0f69c43 100644
--- a/decompiler/level_extractor/extract_merc.cpp
+++ b/decompiler/level_extractor/extract_merc.cpp
@@ -885,6 +885,10 @@ ConvertedMercEffect convert_merc_effect(const MercEffect& input_effect,
       can_be_modified = true;
     }
 
+    if (version == GameVersion::Jak1 && (input_effect.effect_bits & kTransEffectBitJak1)) {
+      use_alpha_blend = true;
+    }
+
     handle_frag(debug_name, ctrl_header, frag, frag_ctrl, merc_state, result.vertices,
                 merc_memories[memory_buffer_toggle], can_be_modified, combined_lump4_addr, fi);
     u32 vert_count = frag.lump4_unpacked.size() / 3;
diff --git a/goal_src/jak1/engine/common-obs/rigid-body.gc b/goal_src/jak1/engine/common-obs/rigid-body.gc
index dc8c0c415..fcd0b49a8 100644
--- a/goal_src/jak1/engine/common-obs/rigid-body.gc
+++ b/goal_src/jak1/engine/common-obs/rigid-body.gc
@@ -451,7 +451,7 @@
   (+! (-> obj sim-time-remaining)
       (* 0.0033333334 (the float (- (-> *display* base-frame-counter) (-> *display* old-base-frame-counter))))
       )
-  (let ((f30-0 0.016666668)
+  (let ((f30-0 (* DISPLAY_FPS_RATIO 0.016666668)) ;; changed for high fps
         (f28-0 (* 0.0033333334 (the float (logand #xffffff (-> *display* base-frame-counter)))))
         )
     (while (>= (-> obj sim-time-remaining) (* 0.5 f30-0))