Program: 30737
Project: 30737
Buggy source:
@Override public boolean renderInWorld(AEBaseBlock blk,IBlockAccess world,int x,int y,int z,RenderBlocks renderer){
  boolean xx=world.getTileEntity(x - 1,y,z) instanceof TileController && world.getTileEntity(x + 1,y,z) instanceof TileController;
  boolean yy=world.getTileEntity(x,y - 1,z) instanceof TileController && world.getTileEntity(x,y + 1,z) instanceof TileController;
  boolean zz=world.getTileEntity(x,y,z - 1) instanceof TileController && world.getTileEntity(x,y,z + 1) instanceof TileController;
  int meta=world.getBlockMetadata(x,y,z);
  boolean hasPower=meta > 0;
  boolean isConflict=meta == 2;
  ExtraTextures lights=null;
  if (xx && !yy && !zz) {
    if (hasPower) {
      blk.getRendererInstance().setTemporaryRenderIcon(ExtraTextures.BlockControllerColumnPowered.getIcon());
      if (isConflict)       lights=ExtraTextures.BlockControllerColumnConflict;
 else       lights=ExtraTextures.BlockControllerColumnLights;
    }
 else     blk.getRendererInstance().setTemporaryRenderIcon(ExtraTextures.BlockControllerColumn.getIcon());
    renderer.uvRotateEast=1;
    renderer.uvRotateWest=1;
    renderer.uvRotateTop=1;
    renderer.uvRotateBottom=1;
  }
 else   if (!xx && yy && !zz) {
    if (hasPower) {
      blk.getRendererInstance().setTemporaryRenderIcon(ExtraTextures.BlockControllerColumnPowered.getIcon());
      if (isConflict)       lights=ExtraTextures.BlockControllerColumnConflict;
 else       lights=ExtraTextures.BlockControllerColumnLights;
    }
 else     blk.getRendererInstance().setTemporaryRenderIcon(ExtraTextures.BlockControllerColumn.getIcon());
    renderer.uvRotateEast=0;
    renderer.uvRotateNorth=0;
  }
 else   if (!xx && !yy && zz) {
    if (hasPower) {
      blk.getRendererInstance().setTemporaryRenderIcon(ExtraTextures.BlockControllerColumnPowered.getIcon());
      if (isConflict)       lights=ExtraTextures.BlockControllerColumnConflict;
 else       lights=ExtraTextures.BlockControllerColumnLights;
    }
 else     blk.getRendererInstance().setTemporaryRenderIcon(ExtraTextures.BlockControllerColumn.getIcon());
    renderer.uvRotateNorth=1;
    renderer.uvRotateSouth=1;
    renderer.uvRotateTop=0;
  }
 else   if ((xx ? 1 : 0) + (yy ? 1 : 0) + (zz ? 1 : 0) >= 2) {
    int v=(Math.abs(x) + Math.abs(y) + Math.abs(z)) % 2;
    renderer.uvRotateEast=renderer.uvRotateBottom=renderer.uvRotateNorth=renderer.uvRotateSouth=renderer.uvRotateTop=renderer.uvRotateWest=0;
    if (v == 0)     blk.getRendererInstance().setTemporaryRenderIcon(ExtraTextures.BlockControllerInsideA.getIcon());
 else     blk.getRendererInstance().setTemporaryRenderIcon(ExtraTextures.BlockControllerInsideB.getIcon());
  }
 else {
    if (hasPower) {
      blk.getRendererInstance().setTemporaryRenderIcon(ExtraTextures.BlockControllerPowered.getIcon());
      if (isConflict)       lights=ExtraTextures.BlockControllerConflict;
 else       lights=ExtraTextures.BlockControllerLights;
    }
 else     blk.getRendererInstance().setTemporaryRenderIcon(null);
  }
  boolean out=renderer.renderStandardBlock(blk,x,y,z);
  if (lights != null) {
    Tessellator.instance.setColorOpaque_F(1.0f,1.0f,1.0f);
    Tessellator.instance.setBrightness(14 << 20 | 14 << 4);
    renderer.renderFaceXNeg(blk,x,y,z,lights.getIcon());
    renderer.renderFaceXPos(blk,x,y,z,lights.getIcon());
    renderer.renderFaceYNeg(blk,x,y,z,lights.getIcon());
    renderer.renderFaceYPos(blk,x,y,z,lights.getIcon());
    renderer.renderFaceZNeg(blk,x,y,z,lights.getIcon());
    renderer.renderFaceZPos(blk,x,y,z,lights.getIcon());
  }
  blk.getRendererInstance().setTemporaryRenderIcon(null);
  renderer.uvRotateEast=renderer.uvRotateBottom=renderer.uvRotateNorth=renderer.uvRotateSouth=renderer.uvRotateTop=renderer.uvRotateWest=0;
  return out;
}

Fixed version (ground truth):
@Override public boolean renderInWorld(AEBaseBlock blk,IBlockAccess world,int x,int y,int z,RenderBlocks renderer){
  boolean xx=getTileEntity(world,x - 1,y,z) instanceof TileController && getTileEntity(world,x + 1,y,z) instanceof TileController;
  boolean yy=getTileEntity(world,x,y - 1,z) instanceof TileController && getTileEntity(world,x,y + 1,z) instanceof TileController;
  boolean zz=getTileEntity(world,x,y,z - 1) instanceof TileController && getTileEntity(world,x,y,z + 1) instanceof TileController;
  int meta=world.getBlockMetadata(x,y,z);
  boolean hasPower=meta > 0;
  boolean isConflict=meta == 2;
  ExtraTextures lights=null;
  if (xx && !yy && !zz) {
    if (hasPower) {
      blk.getRendererInstance().setTemporaryRenderIcon(ExtraTextures.BlockControllerColumnPowered.getIcon());
      if (isConflict)       lights=ExtraTextures.BlockControllerColumnConflict;
 else       lights=ExtraTextures.BlockControllerColumnLights;
    }
 else     blk.getRendererInstance().setTemporaryRenderIcon(ExtraTextures.BlockControllerColumn.getIcon());
    renderer.uvRotateEast=1;
    renderer.uvRotateWest=1;
    renderer.uvRotateTop=1;
    renderer.uvRotateBottom=1;
  }
 else   if (!xx && yy && !zz) {
    if (hasPower) {
      blk.getRendererInstance().setTemporaryRenderIcon(ExtraTextures.BlockControllerColumnPowered.getIcon());
      if (isConflict)       lights=ExtraTextures.BlockControllerColumnConflict;
 else       lights=ExtraTextures.BlockControllerColumnLights;
    }
 else     blk.getRendererInstance().setTemporaryRenderIcon(ExtraTextures.BlockControllerColumn.getIcon());
    renderer.uvRotateEast=0;
    renderer.uvRotateNorth=0;
  }
 else   if (!xx && !yy && zz) {
    if (hasPower) {
      blk.getRendererInstance().setTemporaryRenderIcon(ExtraTextures.BlockControllerColumnPowered.getIcon());
      if (isConflict)       lights=ExtraTextures.BlockControllerColumnConflict;
 else       lights=ExtraTextures.BlockControllerColumnLights;
    }
 else     blk.getRendererInstance().setTemporaryRenderIcon(ExtraTextures.BlockControllerColumn.getIcon());
    renderer.uvRotateNorth=1;
    renderer.uvRotateSouth=1;
    renderer.uvRotateTop=0;
  }
 else   if ((xx ? 1 : 0) + (yy ? 1 : 0) + (zz ? 1 : 0) >= 2) {
    int v=(Math.abs(x) + Math.abs(y) + Math.abs(z)) % 2;
    renderer.uvRotateEast=renderer.uvRotateBottom=renderer.uvRotateNorth=renderer.uvRotateSouth=renderer.uvRotateTop=renderer.uvRotateWest=0;
    if (v == 0)     blk.getRendererInstance().setTemporaryRenderIcon(ExtraTextures.BlockControllerInsideA.getIcon());
 else     blk.getRendererInstance().setTemporaryRenderIcon(ExtraTextures.BlockControllerInsideB.getIcon());
  }
 else {
    if (hasPower) {
      blk.getRendererInstance().setTemporaryRenderIcon(ExtraTextures.BlockControllerPowered.getIcon());
      if (isConflict)       lights=ExtraTextures.BlockControllerConflict;
 else       lights=ExtraTextures.BlockControllerLights;
    }
 else     blk.getRendererInstance().setTemporaryRenderIcon(null);
  }
  boolean out=renderer.renderStandardBlock(blk,x,y,z);
  if (lights != null) {
    Tessellator.instance.setColorOpaque_F(1.0f,1.0f,1.0f);
    Tessellator.instance.setBrightness(14 << 20 | 14 << 4);
    renderer.renderFaceXNeg(blk,x,y,z,lights.getIcon());
    renderer.renderFaceXPos(blk,x,y,z,lights.getIcon());
    renderer.renderFaceYNeg(blk,x,y,z,lights.getIcon());
    renderer.renderFaceYPos(blk,x,y,z,lights.getIcon());
    renderer.renderFaceZNeg(blk,x,y,z,lights.getIcon());
    renderer.renderFaceZPos(blk,x,y,z,lights.getIcon());
  }
  blk.getRendererInstance().setTemporaryRenderIcon(null);
  renderer.uvRotateEast=renderer.uvRotateBottom=renderer.uvRotateNorth=renderer.uvRotateSouth=renderer.uvRotateTop=renderer.uvRotateWest=0;
  return out;
}