How do I create a velocity gradient volume?
Follow the steps below to display the vertical gradient of a velocity volume at any point. Using the velocity gradient, large changes in the velocity can be easily seen.
1. Copy volume
![1. Copy volume](https://media.screensteps.com/image_assets/assets/003/311/995/original/73f261e9-15b8-453d-9362-babbf4cdf9b2.png)
To be able to display the velocity gradient, a duplicate of the velocity volume is required.
Follow the steps in Creating a Copy of a Volume to create a copy, export and configure the velocity volume.
2. Set bulk shift
![2. Set bulk shift](https://media.screensteps.com/image_assets/assets/003/311/998/original/d95bb195-f83b-446a-9554-0e3187b70edf.png)
After creating a copy of the velocity volume, shift the duplicate volume by the desired value, e.g. -100 ms (see Manual Mistie Corrections).
3. Volume math
![3. Volume math](https://media.screensteps.com/image_assets/assets/003/312/000/original/9e1a116c-d98c-48df-a562-f0d58f9d193f.png)
Create another Volume Maths process, and select the original and the duplicate volume. At Formula, type
v2-v1
where:
- v2 = copied and shifted velocity
- v1 = original velocity volume.
As a result of this process, a new volume is available in the Volume tab based on the Formula.