OOoh, that's it - volume limit was on zero, thanks jsmack!
-Jasper
Found 63 posts.
Search results Show results as topic list.
Technical Discussion » How to have GI emission have an effect on volumetrics
- druitre
- 63 posts
- Offline
Technical Discussion » How to have GI emission have an effect on volumetrics
- druitre
- 63 posts
- Offline
Hi Olaf, I don't see any result from any geo with emissive material. Am I missing something somewhere?
Technical Discussion » How to have GI emission have an effect on volumetrics
- druitre
- 63 posts
- Offline
Hi, I have a scene with fireworks and would like the sparks to light up the smoketrails. So far, it seems I can only light up my volumetrics with lights, not with an emissive material on the particles. Is that a Houdini limitation? Or am I missing a setting somewhere?
ATM, I can get my result only by instancing lights to the particles, which gets very slow when I'm emitting tons of particles, and doesn't transfer all the relevant point attributes (size/brightness/alpha) to the lights.
Thanks,
Jasper
ATM, I can get my result only by instancing lights to the particles, which gets very slow when I'm emitting tons of particles, and doesn't transfer all the relevant point attributes (size/brightness/alpha) to the lights.
Thanks,
Jasper
Technical Discussion » deleting/killing particles by bounding box, but with threshold and/or falloff
- druitre
- 63 posts
- Offline
Hi Jeff,
that is brilliant! And interesting to dissect, for a noob like me. Now, is there in houdini a similar workflow as in Soft/ICE where I would create and save a custom compound out of this, that would pop up in the tab-menu from then on? Preferably in a custom folder set/subset so i could keep track of my custom operators?
Anyway, thanks a lot!
Jasper
that is brilliant! And interesting to dissect, for a noob like me. Now, is there in houdini a similar workflow as in Soft/ICE where I would create and save a custom compound out of this, that would pop up in the tab-menu from then on? Preferably in a custom folder set/subset so i could keep track of my custom operators?
Anyway, thanks a lot!
Jasper
Technical Discussion » deleting/killing particles by bounding box, but with threshold and/or falloff
- druitre
- 63 posts
- Offline
I see what's happening - my scene is on a vastly bigger scale, I'm working with a couple of kilometers. If I scale up the box x 1000, the falloff range diminishes to near nothing. If I scale up the voxelsize x 1000, I keep the falloffrange but then when i move the box, it falls in between voxels so disappears. (If that is clear).
I'd have to increase the falloff range x 1000 as well to have it work, Band doesn't help either. I'll try some more.
I'd have to increase the falloff range x 1000 as well to have it work, Band doesn't help either. I'll try some more.
Technical Discussion » deleting/killing particles by bounding box, but with threshold and/or falloff
- druitre
- 63 posts
- Offline
Nope. Did that. The area of effect grows/shrinks when I move, but no movement of the area.
Technical Discussion » deleting/killing particles by bounding box, but with threshold and/or falloff
- druitre
- 63 posts
- Offline
Hi Patar, when i translate the box in your scene, the effect disappears. Why is that, and how do i fix it? I'm trying to find out but no success so far…
- I can move the VDB, but not the input object - for a lot of purposes, it would be very useful if it could be the object that moves.
- I can move the VDB, but not the input object - for a lot of purposes, it would be very useful if it could be the object that moves.
Edited by druitre - Aug. 18, 2017 13:39:22
Technical Discussion » deleting/killing particles by bounding box, but with threshold and/or falloff
- druitre
- 63 posts
- Offline
@Jeff, I looked at your example and I think that one also works only as a simulation (so over time) whereas I want it to be unsimulated/instant. Thanks though, as I can learn from it.
Just to elaborate, here's another snapshot, from the delete by volume node in Soft - how it works inside. I think some of it corresponds to what Patar did. Am I right to assume that in H, you have to use volumes/VDBs to do this type of thing?:
Just to elaborate, here's another snapshot, from the delete by volume node in Soft - how it works inside. I think some of it corresponds to what Patar did. Am I right to assume that in H, you have to use volumes/VDBs to do this type of thing?:
Technical Discussion » deleting/killing particles by bounding box, but with threshold and/or falloff
- druitre
- 63 posts
- Offline
patar
try this one
Ha! Yes, that's it. I'm gonna have to scrutinize over this one to figure out what you've done but it does what the Softimage equivalent does, and then some.
Very cool, thanks a lot!
-Jasper
Technical Discussion » deleting/killing particles by bounding box, but with threshold and/or falloff
- druitre
- 63 posts
- Offline
Yep, I checked, it happens each frame, so over time. What I'm looking for is probably not a ‘kill’ but a ‘delete’ - it has to work with a cached input. Not as a DOP, but I guess as a SOP (new to Houdini, so perhaps not using the right terminology)
Edited by druitre - Aug. 18, 2017 12:14:49
Technical Discussion » deleting/killing particles by bounding box, but with threshold and/or falloff
- druitre
- 63 posts
- Offline
patar
i think he means like when the particle entered a region it is not dead but entered a group….and from that group particles is selected randomly to die…
i think its very simple to do in houdini
like this?
That might do it, looks like it's a deletion over time?
Thanks!
Jasper
Technical Discussion » deleting/killing particles by bounding box, but with threshold and/or falloff
- druitre
- 63 posts
- Offline
Maybe the terminology is different, its a percentage thing. 100% of the particles get deleted within the bounding box, 0% a given distance from that. Halfway, 50%. Etc.
Technical Discussion » deleting/killing particles by bounding box, but with threshold and/or falloff
- druitre
- 63 posts
- Offline
Hi,
as the title says… I'm coming from Softimage, where a ‘delete by volume’ node has options for a falloff range. How do I set up a ‘delete by bounding box’ in Houdini so that the deletion will fall off gradually?
Thanks,
Jasper
as the title says… I'm coming from Softimage, where a ‘delete by volume’ node has options for a falloff range. How do I set up a ‘delete by bounding box’ in Houdini so that the deletion will fall off gradually?
Thanks,
Jasper
Technical Discussion » What happened to 'Use Point Alpha' in Principled Shader and how to get it now?
- druitre
- 63 posts
- Offline
Technical Discussion » What happened to 'Use Point Alpha' in Principled Shader and how to get it now?
- druitre
- 63 posts
- Offline
Ah, now I see it, thanks - indeed a lot easier - I didn't realize where i had to type in the name of the attribute.
-Jasper
-Jasper
Technical Discussion » What happened to 'Use Point Alpha' in Principled Shader and how to get it now?
- druitre
- 63 posts
- Offline
@jsmack - I forgot to mention I'm asking for H16 specifically. ‘Use Point Aplha’ is not there anymore.
@ Joker 386 - could you please add screenshot(s)? H16 specific?
I did figure out a way to do it in the meantime - using a Surface Color (Shading(Utilities)) node in Mat and a Attribute Create node in SOP, it doesn't sound like the same thing you propose though, so I'm curious to see your solution.
Regards, Jasper
@ Joker 386 - could you please add screenshot(s)? H16 specific?
I did figure out a way to do it in the meantime - using a Surface Color (Shading(Utilities)) node in Mat and a Attribute Create node in SOP, it doesn't sound like the same thing you propose though, so I'm curious to see your solution.
Regards, Jasper
Technical Discussion » What happened to 'Use Point Alpha' in Principled Shader and how to get it now?
- druitre
- 63 posts
- Offline
Well, the title says it all… I'm trying but not succeeding in managing my particles' opacity over life.
Technical Discussion » $N variable in file cache node not working? - H16
- druitre
- 63 posts
- Offline
Technical Discussion » $N - variable in filenames not working in H16?
- druitre
- 63 posts
- Offline
Thanks (And sorry for the double post (the one by druitre, I was logged in under our office account instead of my own)
- Jasper/druitre
- Jasper/druitre
Technical Discussion » $N variable in file cache node not working? - H16
- druitre
- 63 posts
- Offline
Doesn't seem to work - when I switch $F to $N according to manual should render out files sequentially numbered. Instead gives no number so overwrites each frame. Is it broken? Or replaced by other variable?
- Jasper
- Jasper
-
- Quick Links