Program: 161322
Project: 161322
Buggy source:
@Override public boolean renderWorldBlock(IBlockAccess world,int x,int y,int z,Block block,int modelId,RenderBlocks renderer){
  if (!(block instanceof BlockFuelRod)) {
    return false;
  }
  Tessellator tessellator=Tessellator.instance;
  BlockFuelRod blockFuelRod=(BlockFuelRod)block;
  boolean renderTop=block.shouldSideBeRendered(world,x,y + 1,z,0);
  boolean renderBottom=block.shouldSideBeRendered(world,x,y - 1,z,0);
  boolean renderedFuelOnTop=false;
  boolean renderedFuelOnBottom=false;
  boolean[] renderSides=new boolean[]{block.shouldSideBeRendered(world,x,y,z - 1,2),block.shouldSideBeRendered(world,x,y,z + 1,3),block.shouldSideBeRendered(world,x - 1,y,z,4),block.shouldSideBeRendered(world,x + 1,y,z,5)};
  if (!renderTop && !renderBottom && !renderSides[0]&& !renderSides[1]&& !renderSides[2]&& !renderSides[3]) {
    return false;
  }
  boolean rendered=false;
  int blockMetadata=world.getBlockMetadata(x,y,z);
  TileEntity te;
  te=world.getTileEntity(x,y,z);
  if (te instanceof TileEntityReactorFuelRod) {
    TileEntityReactorFuelRod fuelRod=(TileEntityReactorFuelRod)te;
    if (fuelRod.isConnected()) {
      MultiblockReactor reactor=(MultiblockReactor)fuelRod.getMultiblockController();
      int fuelAmount=reactor.getFuelAmount();
      int wasteAmount=reactor.getWasteAmount();
      int totalFluid=fuelAmount + wasteAmount;
      int capacity=reactor.getCapacity();
      if (capacity > 0 && totalFluid > 0) {
        float fluidColumnOffsetFromCenter=-1f;
        float red, green, blue;
        IIcon iconSide, iconBottom;
        iconSide=iconBottom=null;
        red=green=blue=1f;
        iconSide=BigReactors.fluidFuelColumn.getFlowingIcon();
        iconBottom=BigReactors.fluidFuelColumn.getStillIcon();
        ReactantData fuelData=Reactants.getReactant(reactor.getFuelType());
        ReactantData wasteData=Reactants.getReactant(reactor.getWasteType());
        int fuelColor=fuelData != null ? fuelData.getColor() : StandardReactants.colorYellorium;
        int wasteColor=wasteData != null ? wasteData.getColor() : StandardReactants.colorCyanite;
        if (fuelAmount == 0) {
          red=unpackR(wasteColor);
          green=unpackG(wasteColor);
          blue=unpackB(wasteColor);
        }
 else         if (fuelAmount >= totalFluid) {
          red=unpackR(fuelColor);
          green=unpackG(fuelColor);
          blue=unpackB(fuelColor);
        }
 else {
          float proportion=(float)fuelAmount / (float)totalFluid;
          float fuelR, fuelG, fuelB;
          float wasteR, wasteG, wasteB;
          fuelR=unpackR(fuelColor);
          fuelG=unpackG(fuelColor);
          fuelB=unpackB(fuelColor);
          wasteR=unpackR(wasteColor);
          wasteG=unpackG(wasteColor);
          wasteB=unpackB(wasteColor);
          red=lerp(wasteR,fuelR,proportion);
          green=lerp(wasteG,fuelG,proportion);
          blue=lerp(wasteB,fuelB,proportion);
        }
        float pctFilled=Math.min(1f,Math.max(0f,(float)totalFluid / (float)capacity));
        fluidColumnOffsetFromCenter=lerp(FLUID_RENDER_OFFSET_MIN,FLUID_RENDER_OFFSET_MAX,pctFilled);
        if (iconSide != null && iconBottom != null) {
          tessellator.setColorRGBA_F(red,green,blue,0.75f);
          tessellator.setBrightness(world.getLightBrightnessForSkyBlocks(x,y,z,15));
          renderer.setOverrideBlockTexture(iconBottom);
          float xzMin=fluidColumnOffsetFromCenter;
          float xzMax=1f - fluidColumnOffsetFromCenter;
          renderer.setRenderBounds(xzMin,0.01f,xzMin,xzMax,0.99f,xzMax);
          if (renderer.renderAllFaces || renderBottom) {
            rendered=true;
            renderer.renderFaceYNeg(block,x,y,z,iconBottom);
          }
          if (renderer.renderAllFaces || renderTop) {
            rendered=true;
            renderer.renderFaceYPos(block,x,y,z,iconBottom);
          }
          renderer.setOverrideBlockTexture(iconSide);
          renderer.setRenderBounds(xzMin,0f,xzMin,xzMax,1f,xzMax);
          if (renderer.renderAllFaces || renderSides[0]) {
            rendered=true;
            renderer.renderFaceZNeg(block,x,y,z,iconSide);
          }
          if (renderer.renderAllFaces || renderSides[1]) {
            rendered=true;
            renderer.renderFaceZPos(block,x,y,z,iconSide);
          }
          if (renderer.renderAllFaces || renderSides[2]) {
            rendered=true;
            renderer.renderFaceXNeg(block,x,y,z,iconSide);
          }
          if (renderer.renderAllFaces || renderSides[3]) {
            rendered=true;
            renderer.renderFaceXPos(block,x,y,z,iconSide);
          }
        }
      }
    }
  }
  tessellator.setColorRGBA(255,255,255,255);
  renderer.setRenderBoundsFromBlock(block);
  renderer.setOverrideBlockTexture(null);
  if (!renderedFuelOnBottom && (renderer.renderAllFaces || renderBottom)) {
    rendered=true;
    tessellator.setBrightness(block.getMixedBrightnessForBlock(world,x,y,z));
    renderer.renderFaceYNeg(block,x,y,z,block.getIcon(0,blockMetadata));
  }
  if (renderer.renderAllFaces || renderTop) {
    rendered=true;
    tessellator.setBrightness(block.getMixedBrightnessForBlock(world,x,y,z));
    renderer.renderFaceYPos(block,x,y,z,block.getIcon(1,blockMetadata));
  }
  if (renderer.renderAllFaces || renderSides[0]) {
    rendered=true;
    tessellator.setBrightness(block.getMixedBrightnessForBlock(world,x,y,z));
    renderer.renderFaceZNeg(block,x,y,z,block.getIcon(2,blockMetadata));
  }
  if (renderer.renderAllFaces || renderSides[1]) {
    rendered=true;
    tessellator.setBrightness(block.getMixedBrightnessForBlock(world,x,y,z));
    renderer.renderFaceZPos(block,x,y,z,block.getIcon(3,blockMetadata));
  }
  if (renderer.renderAllFaces || renderSides[2]) {
    rendered=true;
    tessellator.setBrightness(block.getMixedBrightnessForBlock(world,x,y,z));
    renderer.renderFaceXNeg(block,x,y,z,block.getIcon(4,blockMetadata));
  }
  if (renderer.renderAllFaces || renderSides[3]) {
    rendered=true;
    tessellator.setBrightness(block.getMixedBrightnessForBlock(world,x,y,z));
    renderer.renderFaceXPos(block,x,y,z,block.getIcon(5,blockMetadata));
  }
  return rendered;
}

Fixed version (ground truth):
@Override public boolean renderWorldBlock(IBlockAccess world,int x,int y,int z,Block block,int modelId,RenderBlocks renderer){
  if (!(block instanceof BlockFuelRod)) {
    return false;
  }
  Tessellator tessellator=Tessellator.instance;
  boolean renderTop=block.shouldSideBeRendered(world,x,y + 1,z,0);
  boolean renderBottom=block.shouldSideBeRendered(world,x,y - 1,z,0);
  boolean renderedFuelOnTop=false;
  boolean renderedFuelOnBottom=false;
  boolean[] renderSides=new boolean[]{block.shouldSideBeRendered(world,x,y,z - 1,2),block.shouldSideBeRendered(world,x,y,z + 1,3),block.shouldSideBeRendered(world,x - 1,y,z,4),block.shouldSideBeRendered(world,x + 1,y,z,5)};
  if (!renderTop && !renderBottom && !renderSides[0]&& !renderSides[1]&& !renderSides[2]&& !renderSides[3]) {
    return false;
  }
  boolean rendered=false;
  int blockMetadata=world.getBlockMetadata(x,y,z);
  TileEntity te;
  te=world.getTileEntity(x,y,z);
  if (te instanceof TileEntityReactorFuelRod) {
    TileEntityReactorFuelRod fuelRod=(TileEntityReactorFuelRod)te;
    if (fuelRod.isConnected()) {
      MultiblockReactor reactor=(MultiblockReactor)fuelRod.getMultiblockController();
      int fuelAmount=reactor.getFuelAmount();
      int wasteAmount=reactor.getWasteAmount();
      int totalFluid=fuelAmount + wasteAmount;
      int capacity=reactor.getCapacity();
      if (capacity > 0 && totalFluid > 0) {
        float fluidColumnOffsetFromCenter=-1f;
        float red, green, blue;
        IIcon iconSide, iconBottom;
        iconSide=iconBottom=null;
        red=green=blue=1f;
        iconSide=BigReactors.fluidFuelColumn.getFlowingIcon();
        iconBottom=BigReactors.fluidFuelColumn.getStillIcon();
        ReactantData fuelData=Reactants.getReactant(reactor.getFuelType());
        ReactantData wasteData=Reactants.getReactant(reactor.getWasteType());
        int fuelColor=fuelData != null ? fuelData.getColor() : StandardReactants.colorYellorium;
        int wasteColor=wasteData != null ? wasteData.getColor() : StandardReactants.colorCyanite;
        if (fuelAmount == 0) {
          red=unpackR(wasteColor);
          green=unpackG(wasteColor);
          blue=unpackB(wasteColor);
        }
 else         if (fuelAmount >= totalFluid) {
          red=unpackR(fuelColor);
          green=unpackG(fuelColor);
          blue=unpackB(fuelColor);
        }
 else {
          float proportion=(float)fuelAmount / (float)totalFluid;
          float fuelR, fuelG, fuelB;
          float wasteR, wasteG, wasteB;
          fuelR=unpackR(fuelColor);
          fuelG=unpackG(fuelColor);
          fuelB=unpackB(fuelColor);
          wasteR=unpackR(wasteColor);
          wasteG=unpackG(wasteColor);
          wasteB=unpackB(wasteColor);
          red=lerp(wasteR,fuelR,proportion);
          green=lerp(wasteG,fuelG,proportion);
          blue=lerp(wasteB,fuelB,proportion);
        }
        float pctFilled=Math.min(1f,Math.max(0f,(float)totalFluid / (float)capacity));
        fluidColumnOffsetFromCenter=lerp(FLUID_RENDER_OFFSET_MIN,FLUID_RENDER_OFFSET_MAX,pctFilled);
        if (iconSide != null && iconBottom != null) {
          tessellator.setColorRGBA_F(red,green,blue,0.75f);
          tessellator.setBrightness(world.getLightBrightnessForSkyBlocks(x,y,z,15));
          renderer.setOverrideBlockTexture(iconBottom);
          float xzMin=fluidColumnOffsetFromCenter;
          float xzMax=1f - fluidColumnOffsetFromCenter;
          renderer.setRenderBounds(xzMin,0.01f,xzMin,xzMax,0.99f,xzMax);
          if (renderer.renderAllFaces || renderBottom) {
            rendered=true;
            renderer.renderFaceYNeg(block,x,y,z,iconBottom);
          }
          if (renderer.renderAllFaces || renderTop) {
            rendered=true;
            renderer.renderFaceYPos(block,x,y,z,iconBottom);
          }
          renderer.setOverrideBlockTexture(iconSide);
          renderer.setRenderBounds(xzMin,0f,xzMin,xzMax,1f,xzMax);
          if (renderer.renderAllFaces || renderSides[0]) {
            rendered=true;
            renderer.renderFaceZNeg(block,x,y,z,iconSide);
          }
          if (renderer.renderAllFaces || renderSides[1]) {
            rendered=true;
            renderer.renderFaceZPos(block,x,y,z,iconSide);
          }
          if (renderer.renderAllFaces || renderSides[2]) {
            rendered=true;
            renderer.renderFaceXNeg(block,x,y,z,iconSide);
          }
          if (renderer.renderAllFaces || renderSides[3]) {
            rendered=true;
            renderer.renderFaceXPos(block,x,y,z,iconSide);
          }
        }
      }
    }
  }
  tessellator.setColorRGBA(255,255,255,255);
  renderer.setRenderBoundsFromBlock(block);
  renderer.setOverrideBlockTexture(null);
  if (!renderedFuelOnBottom && (renderer.renderAllFaces || renderBottom)) {
    rendered=true;
    tessellator.setBrightness(block.getMixedBrightnessForBlock(world,x,y,z));
    renderer.renderFaceYNeg(block,x,y,z,block.getIcon(0,blockMetadata));
  }
  if (renderer.renderAllFaces || renderTop) {
    rendered=true;
    tessellator.setBrightness(block.getMixedBrightnessForBlock(world,x,y,z));
    renderer.renderFaceYPos(block,x,y,z,block.getIcon(1,blockMetadata));
  }
  if (renderer.renderAllFaces || renderSides[0]) {
    rendered=true;
    tessellator.setBrightness(block.getMixedBrightnessForBlock(world,x,y,z));
    renderer.renderFaceZNeg(block,x,y,z,block.getIcon(2,blockMetadata));
  }
  if (renderer.renderAllFaces || renderSides[1]) {
    rendered=true;
    tessellator.setBrightness(block.getMixedBrightnessForBlock(world,x,y,z));
    renderer.renderFaceZPos(block,x,y,z,block.getIcon(3,blockMetadata));
  }
  if (renderer.renderAllFaces || renderSides[2]) {
    rendered=true;
    tessellator.setBrightness(block.getMixedBrightnessForBlock(world,x,y,z));
    renderer.renderFaceXNeg(block,x,y,z,block.getIcon(4,blockMetadata));
  }
  if (renderer.renderAllFaces || renderSides[3]) {
    rendered=true;
    tessellator.setBrightness(block.getMixedBrightnessForBlock(world,x,y,z));
    renderer.renderFaceXPos(block,x,y,z,block.getIcon(5,blockMetadata));
  }
  return rendered;
}