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Found 9 results

  1. Hello! just wondering what's the best way to gradually decrease the amount of fluid emitted by an object...is there any way of multiply the emission volume by a noise that slowly goes to 0 in amplitude?
  2. Hi, Silly question, but I'm using "old pops" and I just want to simply emit some particles when a point dies(not using collisions) and then create a small burst around the death event of each point dying. Any help would be appreciated as I'm a total noob with expressions/wrangles etc.
  3. Mantra shader emission issue

    Hi, It seems i cannot get the emission to work anymore when using a mantra shader or a material shader builder. The object doesn't light up nor illuminate other object. It works fine with principled shader tho. The project i am working on needs object to evolve thru attributes from emitive to refractive If anyone has a tip or a work around it would be apreciated Thank
  4. Hi guys. I'm doing some tests using shader light emission based on Niels Prayer SciFi Fractal tutorial. But when I pull the values up and use just shader light emission with no other lights I see a lot of noise. I can increase the pixel samples but it increases a lot the render time. I would like to know if its possible to just increase emission light samples to keep pixel samples moderate. Thanks Myke
  5. How would I simply stop my smoke from emitting completely on a certain frame? I'm using Houdini 13 Thanks
  6. Hey, Was playing with 'emiting' packed primitives with bullet, and came across a strange problem. If just have the emitting object on his own, the sim works just fine, but when i add an extra object to the sim, the whole thing just acts strange and add extra geo that shouldnt be there, and that doenst shouw on the geometry spreadsheet. I'm sure i'm doing something wrong but cant see what it is. If anyone could help would really appreciate it. Here's the scene file with both versions. Thanks in advance constraints_v01_010_B.hipnc
  7. Ok so here is my dilemma (one of many lately i know... Im very new to Houdini so please bare with me) I am trying to emit smoke from particles but as you can see from my video attachment, it looks as though the smoke is only emitting mostly from SOME particles and not the others, almost like smoke is choosing which particles to emit from and which ones not too. Also the smoke is going to mostly one side instead of equally spreading out. Maybe i forgot to do a step, but from all the tutorials ive watched i feel ive done every step. I feel very stuck I also am posting some pictures of my Location POP settings. As always, any help is greatly appreciated! ParticlesTest_1.mov
  8. Kill Particles on Rest

    Hi everyone, I am trying to create impact dust when a piece of rock hits the ground. To emit particles I used attribute transfer to create the source from which the particles are emitted and everything is fine to this point. However, I would like the particles to stop emitting when the source geometry stops moving and I can't figure out a way to do it without keying the activation value. Thoughts? Please see attached hip file to get a better idea. Thanks. RnD_Impact_Dust.hip
  9. Hello everyone! I'm trying to achieve an effect with the use of Houdini where multiple sheets of paper is being blown out of an mailbox.(Mail and letters to be exact) My plan is to use different layers of 3d sheets to comp together with some live action plates. 1. Some sheets are Rigid and doesn't fold or bend. This effect I've managed to achieve somewhat. I found a hip file by Valerio Di Napoli where Rigid bodies are being emitted with the help of a particle network. By looking through this .hip I managed to understand the workflow somewhat and create my own RBD emitter. Flipbooks of some test simulations ->youtu.be/f2L9kFGgAH4 My .hip file for this simulation is attached to the post.(RBDs_from_particleEmitter_v002.hip) With some tweaking I think this approach could work as letters are quite stiff when they aren't opened and full of bills One problem I have with this Is that I can't seem to use a grid as the instanced geometry. For reasons I can't understand, when I use a grid they just get stuck at the birth point of the particles and doesn't move at all. As of right now I'm using a box scaled down in the Y axis to act as a letter. 2. Now on to my major problem! Some sheets I want to fold and swirl in the air. I would prefer them to interact with each other but its not must. By using a cloth simulation on a grid to create these sheets of paper works quite well and looks pretty good. Since I don't need as many of these type of sheets, only about 10 or so, I'd like to think that the simulation would not be to expensive to preform? (If more sheets are needed I guess doing multiple simulations would be one way of approaching the problem to avoid performance issues.) Now, I thought that the previous method of emitting RBD might be useful when trying to emitting these more dynamic sheets of paper. I was wondering if there is a way to use the same setup but instead of emitting Rigid bodies I want objects simulated as cloth to be emitted. Is this possible? I tried to just replace my RBD Point Object node with a Cloth Object node and the Rigid Body Solver node with a Cloth Solver node in my DOP network but with no success. Attached a second .hip for this (CLOTH_from_ParticleEmitter_v001.hip) trying to achieve something looking like this but emitting the papers from a specific spot. I'm quite new to Houdini and don't really understand all the abbreviations yet so be gentle on me will ya! Haven't really caught up on the scripting part yet either. I would therefore prefer to solve this without much scripting if that is possible. Is there someone out there who got any thoughts on this? Grateful for any help I could get! Sorry for making this post so long. I tried my best to explain this in my limited English. Thanks! RBDs_from_particleEmitter_v002.hip CLOTH_from_ParticleEmitter_v001.hip