Solved it myself

Here is the solution

when rendering in LOPS using karma there is two nodes when you drop a karma render

### Im assigning some variables here to use later
A = Karma Render Settings LOP
B = USD Render ROP LOP

When you set the output file path on A and fetch B into TOP network then the output attribute is lost, i think this is because that Fetch TOP is just searching for a `output` parm in B which is empty by default.

So to solve this I just added the output image path in the `Override Output Image` parameter and my fetch TOP was able to generate the Output attribute then the downstream TOP nodes can make use of it.

Hope it might help someone who might face the same problem, or alteast for future version of myself.

Thanks.

Hi guys,
I try to fetch my `usdrender_rop` LOP from my stage to a TOP network, to make wedges and montage, I have done the same without using the LOPs but this time its bit more confusing. i can see my wedges work fine it gets rendered but after the `fetch TOP` which is fetching the `usdrender` the output attribute is gone missing so its failing to generate the montage. I can do it after the render by using file pattern but i want this do be done automatically once the render is done.
without me doing one more step after render completes, after all that is why im using TOPs here.
Any help please




Thanks

May be this is what you are looking for.


Select only Visible [youtu.be]

Thanks

Hi guys,

Im trying to glue the end points of a bunch of curves to another curve.

the vellum glue constraint pins the point position well, but rotations are not constrained, it is rotating freely, how do I glue the rotations so that it keeps the initial angle.




Thanks in advance

I have same problem and attached a sample scene to test

Does anyone know how to solve this, unable to restrict the rotation of the glue constraint.
glue just pins the point position.

Thanks in advance.

Hi Enivob,
Thanks for your inputs

Pscale is a float attribute, looks like you are trying to set the scale in multiple axis, so thats why it is not working.

To set scale in multiple axis you will need to set "scale"(vector) attribute instead of "pscale"(float)

Hope that helps.



ps: you can just delete the attributecreate and attributepromote nodes in your scene.

Hi guys,

Looks like the new remesh sop doesn't carry the integer attributes of its input.
I does carries the vectors and floats, this is only an issue with integers(i havent tested rest of the types), I have attached a sample scene here.

"cluster" is my int attribute, you can see it is having unique value per piece before remesh and it becomes 0 after the remesh. however the old remesh does this well.





I have also included a workaround to use the remesh2.0 incase if anyone wants.
Anybody have faced the same problem?

i think your values for the variables are too high so you got spiky lines, ive tried smaller numbers it worked perfectly fine

Hello Masters of the Houdini forums.

I used the same technique which Thomas mentioned to get rid of the error. but however, there are few vanilla nodes in Houdini which has this error by default for example the Timeshift SOP



When I use such nodes in my HDA as shown in the images below then the HDA also inherits the same error since it is connected to the Sub-Network Input #




To Avoid this i have added a "null" between the input and the "timeshift".





Sharing this for someone who might wonder how to solve this.




Thanks!

Yes you are right, Object merge is what you are looking for. One more quick tip. In network editor If you go to view > enable dependencies For selected. Then you can see a brown wire for selected node which shows connection from object merge to your source node. It will be handy to keep it enabled.
Hope that helps 😊

Looks like this is the reason for sure. As malexander said.

Just set that to default, this will get fixed

Hi Eikonoklastes,

Houdini is such a masterpiece, I agree that there are things that can to be improved, but its defenitely not a nightmare .
And for this particular case Houdini has a great solution, I'm sure you will love it.

There is something called a parameter spreadsheet in Houdini,





1 - drag your node/nodes here, or copy paste node path and you can use wildcards as i used here

3 - drag any parms in empty area of the spreadsheet

2 - the dragged parms parms will gets filled in this field, you can use wildcards here as well

once you have done this you can view everything at one place and you can bulk edit parms as you wish.


This spreadsheet can be used to control any object's parms not just ROPS so it is far more useful and very simple.


if you want more then you can also create bundles of your favorite nodes to change and point to your bundle (instead of selecting and dragging nodes)in the field marked 1

Only thing you would still do is that you have to fecth the rops as usual to a ropnet, but i don't see that as a bad thing,
you can visually define your dependencies which is a great thing to have. when you have complex scene with different rops depends on other rops then this will save you.

eikonoklastes
If you have to manually name each Fetch ROP to correspond to the ROP you want to render, you'll have to include important info like frame range and resolution. Manually.

If you change any important settings on the source ROP, you have to manually rename the Fetch ROP again and whatever manual comments you have added, and if you forget to do that, that's going to cause more confusion when you return to this network.

I did not understand this point, fetch is just a ROP node that points to your other Ropsops(such as fileCache) somewhere else in the scene. you don't need to manually rename anything in there, if you rename your source node it should automatically update in the fetch's source parm.




I hope this helps.

Thanks for the answers, i ve read through many forum and posts but couldnt able to import hou into pycharm .

anvdev
You can use hython.exe from $HFS/bin instead of python.exe

When i try this, i cant able to select the hython.exe, it error `invalid interpreter name`

Hi guys,

Have anyone faced this before, im loosing my custom shelf tools often. i dont know what is causing this. if anyone know what im doing wrong please let me know, thanks in advance.

Leap!

They Grow too fast in my back yard 😀

Hi Guys, Did this in the last 2 hours rush, literally at the last minute Im submitting








Thanks!

I can see my main splash in karma, so im sure all works good in the scene except the instances.

Hi guys, H19 is great! currently I'm playing with Karma ROP, it works really fast and XPU alpha is ultimate.

I am trying to use instance node to instance some geos, I can see the instances are working in the sceneview, but not visible in the karma viewport, does anyone face the same issue? or am I doing something wrong