From 783a020e40a0b550d3eb4b509c792ee04bf2705c Mon Sep 17 00:00:00 2001
From: yum <yum.food.vr@gmail.com>
Date: Sun, 27 Jul 2025 19:42:59 -0700
Subject: update README

---
 README.md | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index 8ed5a42..44758c2 100644
--- a/README.md
+++ b/README.md
@@ -1,10 +1,16 @@
 ## FFT on the GPU
 
-This is an optimized GPU-based 2D FFT for VRChat. It is only suitable for use
-in worlds.
+This is an optimized GPU-based 2D FFT for VRChat. Since it uses Custom
+RenderTextures (CRTs), it is only suitable for use in worlds.
+
+Please take note that the FFT is generated in bit-reversed order. You'll have
+to bit-reverse your indices when accessing it. See `apply_2d_bit_reversal` in
+`gpu_fft.cc` for an example of how to do that.
 
 ### Quick start
 
+Import the unitypackage and open the scene.
+
 Run CPU simulator:
 
 ```bash
-- 
cgit v1.2.3