impr(rendering): Machine block casts an ambient occlusion shadow

- Implement the missing ambient occlusion shadow from machine block over neighbour blocks.
- Fix the LightingHelper to properly shade pipes/cables/wires against an opaque block.
- Refactor and cleanup the GT_Block_Machines class of all bad practices and code smell,
  checked and validated with Sonarlint.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/main/java/gregtech/common/blocks/GT_Material_Machines.java b/src/main/java/gregtech/common/blocks/GT_Material_Machines.java
index 8de7421dc4..b9a78f02b3 100644
--- a/src/main/java/gregtech/common/blocks/GT_Material_Machines.java
+++ b/src/main/java/gregtech/common/blocks/GT_Material_Machines.java
@@ -12,6 +12,6 @@ public class GT_Material_Machines extends Material {
     }
 
     public boolean isOpaque() {
-        return false;
+        return true;
     }
 }