entity model error

block bench:

my entity model，export use java model

    private final ModelRenderer renderer;

    public SkyLanternModel() {
        texWidth = 16;
        texHeight = 16;

        renderer = new ModelRenderer(this);
        renderer.setPos(0.0F, 18.0F, 0.0F);
        renderer.texOffs(3, 3).addBox(-5.0F, -8.5F, -5.0F, 10.0F, 0.0F, 10.0F, 0.0F, false);
        renderer.texOffs(0, 25).addBox(-5.5F, -8.0F, -5.5F, 11.0F, 0.0F, 11.0F, 0.0F, false);
        renderer.texOffs(0, 0).addBox(-6.0F, -7.5F, -6.0F, 12.0F, 13.0F, 12.0F, 0.0F, false);
    }

    @Override
    public void setupAnim(Entity entity, float limbSwing, float limbSwingAmount, float ageInTicks, float netHeadYaw,
                          float headPitch) {
    }

    @Override
    public void renderToBuffer(MatrixStack matrixStack, IVertexBuilder buffer, int packedLight, int packedOverlay,
                               float red, float green, float blue, float alpha) {
        renderer.render(matrixStack, buffer, packedLight, packedOverlay);
    }

    public void setRotationAngle(ModelRenderer modelRenderer, float x, float y, float z) {
        modelRenderer.xRot = x;
        modelRenderer.yRot = y;
        modelRenderer.zRot = z;
    }

There is a problem with his rendering, how to make it work