add some connected textures

src/main/resources/assets/gregtech/blockstates/transparent_casing.json

@@ -3,7 +3,7 @@
   "defaults": {
     "model": "minecraft:cube_all",
     "textures": {
-      "all": "gregtech:blocks/casings/transparent/reinforced_glass"
+      "all": "gregtech:blocks/rendering_error"
     }
   },
   "variants": {

src/main/resources/assets/gregtech/textures/blocks/casings/fusion/machine_casing_fusion.png.mcmeta

@@ -0,0 +1,13 @@
+{
+    "ctm": {
+        "ctm_version": 1,
+        "type": "CTM",
+        "layer": "CUTOUT",
+        "textures": [
+            "gregtech:blocks/casings/fusion/machine_casing_fusion_ctm"
+        ],
+        "extra": {
+            "connect_inside": true
+        }
+    }
+}

src/main/resources/assets/gregtech/textures/blocks/casings/fusion/machine_casing_fusion_2.png.mcmeta

@@ -0,0 +1,13 @@
+{
+    "ctm": {
+        "ctm_version": 1,
+        "type": "CTM",
+        "layer": "CUTOUT",
+        "textures": [
+            "gregtech:blocks/casings/fusion/machine_casing_fusion_2_ctm"
+        ],
+        "extra": {
+            "connect_inside": true
+        }
+    }
+}

src/main/resources/assets/gregtech/textures/blocks/casings/transparent/reinforced_glass.png.mcmeta

@@ -0,0 +1,13 @@
+{
+    "ctm": {
+        "ctm_version": 1,
+        "type": "CTM",
+        "layer": "TRANSLUCENT",
+        "textures": [
+            "gregtech:blocks/casings/transparent/reinforced_glass_ctm"
+        ],
+        "extra": {
+            "connect_inside": true
+        }
+    }
+}