Houdini

The asset collections from A23D are provided in universally compatible formats for use in Houdini, ensuring a smooth and efficient importing process. Both 3D models and PBR texture sets arrive ready to integrate into Houdini's node-based pipeline so that geometry, materials, and textures link correctly with minimal manual setup.

Frequently Asked Questions

Common questions about using A23D assets with Houdini

Do I need a plugin to use A23D assets in Houdini?

No. A23D assets are delivered in Houdini-ready open 3D formats that can be imported directly using Houdini's native import tools, File SOPs, Geometry nodes, or Solaris workflows. No plugin or bridge tool is required.

Which file format should I download for use in Houdini?

You don't need to pick a format manually - just select Houdini in the Software dropdown on the asset page and A23D delivers the right format automatically. For Houdini that's .fbx, which preserves object hierarchy, transforms, and material references reliably.

How do I connect A23D PBR textures in Houdini materials?

Load each PBR map into a Principled Shader (Karma/Mantra) or Redshift Material node:

• Base Color / Albedo -> Base Color input
• Roughness -> Roughness input
• Metallic -> Metallic input
• Normal Map -> Normal input via a Normal Map node
• Ambient Occlusion -> Multiply with Base Color (optional)

This setup ensures accurate physically-based shading whether you render with Karma, Mantra, or Redshift.

Are A23D assets scaled correctly for Houdini?

Yes. All A23D assets are modeled in real-world scale. If needed, adjust global scale within the File SOP or via a Transform SOP after import.

Can I use A23D Decals inside Houdini?

Yes. Apply the A23D decal color and opacity maps to a flat card (a subdivided grid) positioned just above the host surface. Use the Principled Shader's Opacity input with the supplied opacity map to mask the decal's shape, or use the Redshift RS Decal object if rendering with Redshift.

How do I use A23D IES lighting profiles in Houdini?

In a Solaris (LOP) context, create an IES Light prim and point its IES file path to the A23D .ies file. For Karma CPU/XPU, the IES prim respects the photometric distribution natively. For Redshift inside Houdini, use a Redshift Light set to IES type and load the .ies file there.

What texture resolution should I use for efficient rendering in Houdini?

Use 4K textures for hero objects, 2K for general scene assets, and 1K or lower for distant geometry. This balances detail with render performance, especially when working with heavy procedural networks or GPU-based renderers like Redshift.