the handlers for the events RenderLivingEvent and RenderPlayerEvent dont have any access to the partialTick time making it impossible to render fluid models/plane/etc without either using reflection to access the Timer object in Minecraft (to get the partialTick from the timer itself) or using ASM to change the visibility of Timer

 

example:

 

public void func_130009_a(AbstractClientPlayer par1AbstractClientPlayer, double par2, double par4, double par6, float par8, float par9)
    {
        if (MinecraftForge.EVENT_BUS.post(new RenderPlayerEvent.Pre(par1AbstractClientPlayer, this))) return;
        float f2 = 1.0F;
        GL11.glColor3f(f2, f2, f2);
        ItemStack itemstack = par1AbstractClientPlayer.inventory.getCurrentItem();
        this.modelArmorChestplate.heldItemRight = this.modelArmor.heldItemRight = this.modelBipedMain.heldItemRight = itemstack != null ? 1 : 0;

        if (itemstack != null && par1AbstractClientPlayer.getItemInUseCount() > 0)
        {
            EnumAction enumaction = itemstack.getItemUseAction();

            if (enumaction == EnumAction.block)
            {
                this.modelArmorChestplate.heldItemRight = this.modelArmor.heldItemRight = this.modelBipedMain.heldItemRight = 3;
            }
            else if (enumaction == EnumAction.bow)
            {
                this.modelArmorChestplate.aimedBow = this.modelArmor.aimedBow = this.modelBipedMain.aimedBow = true;
            }
        }

        this.modelArmorChestplate.isSneak = this.modelArmor.isSneak = this.modelBipedMain.isSneak = par1AbstractClientPlayer.isSneaking();
        double d3 = par4 - (double)par1AbstractClientPlayer.yOffset;

        if (par1AbstractClientPlayer.isSneaking() && !(par1AbstractClientPlayer instanceof EntityPlayerSP))
        {
            d3 -= 0.125D;
        }

        super.func_130000_a(par1AbstractClientPlayer, par2, d3, par6, par8, par9);
        this.modelArmorChestplate.aimedBow = this.modelArmor.aimedBow = this.modelBipedMain.aimedBow = false;
        this.modelArmorChestplate.isSneak = this.modelArmor.isSneak = this.modelBipedMain.isSneak = false;
        this.modelArmorChestplate.heldItemRight = this.modelArmor.heldItemRight = this.modelBipedMain.heldItemRight = 0;
        //MinecraftForge.EVENT_BUS.post(new RenderPlayerEvent.Post(par1AbstractClientPlayer, this));
        //MinecraftForge.EVENT_BUS.post(new RenderPlayerEvent.Post(par1AbstractClientPlayer, this, par9));
    }

par9 is the partialTick btw.

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