Marcel Padilla


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Recent Forum Posts

Game Tools | AliceVision April 8, 2021, 4:39 p.m.

I love this but also get an error when running the av_meshing node

ERROR: unrecognised option "--forceTEdgeDelta"

windows, Houdini 18.5.462 and SideFX labs 18.5.462. The previous nodes (init, analyze, structure, depth) seem to run fine. The issue seems to be in the 09_meshing python call. Same error comes when I use the photogrammetry node. I used 3 input images from Sample Content 1.


How to use scipy with Houdini 17 on windows? June 29, 2020, 10:03 a.m.

Thanks for the update. I've got pip install working. One issue though, I don't seem to be able to use sidefxlabs with this release of Houdini. I get the following error. Is that the same for you too? Or have I broken my install somehow?

Traceback (most recent call last):
File “<console>”, line 1, in <module>
File “C:/PROGRA~1/SIDEEF~1/HOUDIN~1.510/houdini/python3.7libs\”, line 8, in <mod
import urllib2
ModuleNotFoundError: No module named ‘urllib2’

I am unfamiliar with sidefxlabs but I can share myself that this python3 preview is not very stable. In my case, simply renaming a node throws an error.

Traceback (most recent call last):
File “Value Event Handler”, line 7, in <module>
NameError: name ‘unicode’ is not defined

This is why I am still waiting for a more stable version. My guess is that python2 is deeply rooted in many functions and that not all of them have been replaced.

How to use scipy with Houdini 17 on windows? May 13, 2020, 10:24 a.m.

Ok! Everything works with the Houdini 18.0 - Python 3 Tech Preview tech preview on Windows. Finally this issue can rest, for now. I have also updated the description on this tutorial page [] were MacOS & Linux guides will be added.

Installing scipy for Houdini with python3 on Windows

  1. Install a Houdini version with python3. Currently: Check out the daily builds website [] and grab the Python 3 Tech Preview (or the next full Houdini release once python3 becomes default).
  2. Download [] and place it in your Houdini python37 folder (e.g. C:\Program Files\Side Effects Software\Houdini 18.0.456\python37).
  3. Run windows cmd with admin rights and navigate to your python folder (e.g. cd “C:\Program Files\Side Effects Software\Houdini 18.0.456\python37”).
  4. Exectue the command "python3.7.exe" and wait for pip to finish installing. pip.exe should now appear in the /Scripts folder.
  5. Exectue the command "python3.7.exe -m pip install scipy" and wait for scipy to install.
  6. Finished! Your Houdini should now work with scipy. No restarting of Houdini required.

To test if this actually works you should try running the following code inside a python node:

# if you get no error messages for importing these
# SciPy packages then your SciPy works!

# basic test
import scipy
import scipy.sparse as sp
import scipy.sparse.linalg as la