more shaders and updates/changes

shaders/vhs/shader.json

@@ -69,7 +69,7 @@
       "id": "vignetteAmount",
       "label": "Vignette",
       "type": "float",
-      "default": 0.18,
+      "default": 0.3,
       "min": 0,
       "max": 0.6,
       "step": 0.01,
@@ -154,6 +154,46 @@
       "max": 6,
       "step": 0.05,
       "description": "Scale of the generated noise pattern."
+    },
+    {
+      "id": "scanlineAmount",
+      "label": "Scanlines",
+      "type": "float",
+      "default": 0.08,
+      "min": 0,
+      "max": 0.35,
+      "step": 0.005,
+      "description": "Subtle alternating-field luma modulation."
+    },
+    {
+      "id": "chromaCrawlAmount",
+      "label": "Chroma Crawl",
+      "type": "float",
+      "default": 0.035,
+      "min": 0,
+      "max": 0.2,
+      "step": 0.005,
+      "description": "Moving color shimmer around high-contrast edges."
+    },
+    {
+      "id": "generationLoss",
+      "label": "Generation Loss",
+      "type": "float",
+      "default": 0.18,
+      "min": 0,
+      "max": 1,
+      "step": 0.01,
+      "description": "Raises blacks, softens detail, lowers contrast, and desaturates chroma like copied tape."
+    },
+    {
+      "id": "sharpnessDrift",
+      "label": "Sharpness Drift",
+      "type": "float",
+      "default": 0.12,
+      "min": 0,
+      "max": 0.6,
+      "step": 0.01,
+      "description": "Slowly varies picture softness to mimic unstable tape focus."
     }
   ]
 }