Fix translucent model parts of MultiLayerModels rendering as missing models due to differing rendertypes when rendering block model (#7579)

Signed-off-by: HellFirePvP <7419378+HellFirePvP@users.noreply.github.com>

src/main/java/net/minecraftforge/client/model/MultiLayerModel.java

@@ -156,6 +156,9 @@ public final class MultiLayerModel implements IModelGeometry<MultiLayerModel>
                 }
                 return builder.build();
             }
+            // fix translucent layer parts in piston-moving rendering as missing model
+            if (layer == RenderType.getTranslucentMovingBlock())
+                layer = RenderType.getTranslucent();
             // support for item layer rendering
             if (state == null && convertRenderTypes)
                 layer = ITEM_RENDER_TYPE_MAPPING.inverse().getOrDefault(layer, layer);