Jump to content

Noise on ramp transition (edge)

Recommended Posts

Hello amazing Houdini people!


I have been struggling with what i thought would be an easy thing to do. (It probably is but my brain cant figure it out)

In the image below you can see a unified noise (static) being multiplied with ramp paramater. 


Output becomes then noised ramp.


What i want to achieve is noise ONLY on the edge of the ramp. 

Kind of like growth. 


Any advice? Losing my mind here :blink: have been using fit and clamps but cant seem to do it.


One thing to note is taht im not actually animating the ramp, im animating the UV coordinates.





noise ramp.PNG

Link to comment
Share on other sites

  • 2 years later...

Bumping this old thread in case anyone else finds themselves in a similar boat where they're drawing a blank on this technique and end up googling "Houdini noise transition".

The trick is to first form your gradient using a value, in this case the x position along a grid...


...and then add noise to that value.


For a deeper dive into this kind of thing, definitely check out this series of classes by Main Road Post and this brilliant page by Kiryha. 

Hope this helps.

  • Like 3
Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...