renderer.renderFaceXPos(par1BlockHopper, -1.0F + f, 0.0D, 0.0D, icon);
tessellator.draw();
tessellator.startDrawingQuads();
tessellator.setNormal(-1.0F, 0.0F, 0.0F);
renderer.renderFaceXNeg(par1BlockHopper, 1.0F - f, 0.0D, 0.0D, icon);
tessellator.draw();
tessellator.startDrawingQuads();
tessellator.setNormal(0.0F, 0.0F, 1.0F);
renderer.renderFaceZPos(par1BlockHopper, 0.0D, 0.0D, -1.0F + f, icon);
tessellator.draw();
tessellator.startDrawingQuads();