Houdini - Blast By Attribute HDA

• 5 min read

What is Blast By Attribute?

A small but powerful HDA that extends the standard Blast node functionality. Instead of manually selecting primitives or points, you can delete geometry based on attribute values directly from a dropdown menu.

Why I Made This

We’ve all been there — you need to isolate or remove specific parts of geometry based on an attribute like name, class, or material. The standard workflow involves:

  1. Adding a Blast node
  2. Typing the group expression manually
  3. Hoping you got the syntax right

This HDA simplifies everything into a clean interface where you just pick the attribute and select the value you want to blast.

Features

  • Automatic attribute detection from incoming geometry
  • Dropdown menu populated with actual attribute values
  • Works with string, integer, and float attributes
  • Supports both delete and keep modes
  • Clean parameter interface

Use Cases

  • Removing specific named pieces from fractured geometry
  • Isolating materials for shader assignment
  • Filtering simulation groups
  • Quick geometry cleanup during lookdev

Download

HDA available on my Gdrive or Rabitshare

Rabitshare https://emilsvfx.rabbitsphere.com/store/houdini-blast-by-attribute/

Gdrive https://drive.google.com/file/d/1Vav7WciQYFvWXKtwR03qi7ivN3W1R-uj/view?usp=sharing