Houdini 22.0.368 - Is this possbible? I want to flatten an area of my terrain. The heightfield clip COP takes a mask.. how do I paint one on my terrain?

you can use Paint 3D COP and plug your original heightfield into canvas

Thanks, that's what I was trying to do, but I couldn't get it to display in 3d with the 2-flag workflow. After playing around with it a bit, I see I have to put a null downstream of the paint node with the 3d flag enabled and I can see the results in real time on the geo. However, I only seem to be able to paint "height" and all my attempts to paint a brand-new mask were not working.

Basically, I wanted to paint a brand new mask to modulate a HF blur. A collegue of mine came up with this workflow, which works, but is not obvious to say the least!

Is there a better way to do this? (All attempts to paint a mask using the built in tools failed miserably.)

I don't think I understand what you are running into
for me just a simple display flag on the Clip and Paint node selected I can paint interactively



or if you want to display it at the same time, 3D/Display flag workflow seems to work for me

Hmmm... yes, you are right that works not sure what I was doing. Thank you!

Just in case anyone is looking at this in the future, it should be noted that you will not be able to see your brush while viewing the monotorgb output as in tampte's second GIF if Edit -> Preferences -> Objects and Geometry is set to "Geometry View Shows: Node with Display Flag".