# Houdini Help **URL:** https://realtimevfx.com/c/technical/houdini/54.md [Latest](https://realtimevfx.com/latest.md) · [Categories](https://realtimevfx.com/categories.md) · [Tags](https://realtimevfx.com/tags.md) --- ## [SOP Cache problem?](https://realtimevfx.com/t/sop-cache-problem/28184)
**Author:** [@Necker](https://realtimevfx.com/u/Necker)\ **Replies:** 0\ **Last updated:** [December 28, 2024, 3:49pm UTC](https://realtimevfx.com/t/sop-cache-problem/28184 "2024-12-28T15:49:59Z")
Hi everyone, First of all, sorry if my english is bad nad hope you can help me. I have a project where I’m making a tornado in a small city. The problem is when i want to render ar Karma sometimes it crashes when i wan… --- ## [Fill a pond with fluid](https://realtimevfx.com/t/fill-a-pond-with-fluid/27791)
**Author:** [@Necker](https://realtimevfx.com/u/Necker)\ **Replies:** 0\ **Last updated:** [October 28, 2024, 12:01am UTC](https://realtimevfx.com/t/fill-a-pond-with-fluid/27791 "2024-10-28T00:01:24Z")
I would like to know what’s the best way to fill a pond of water. I used a flap tank to fill but it’s square and my pond its not square. What would be the best way? --- ## [Need help with the Houdini Flipbook texture RROP node](https://realtimevfx.com/t/need-help-with-the-houdini-flipbook-texture-rrop-node/27440)
**Author:** [@Syrup404](https://realtimevfx.com/u/Syrup404)\ **Replies:** 1\ **Last updated:** [September 9, 2024, 2:38pm UTC](https://realtimevfx.com/t/need-help-with-the-houdini-flipbook-texture-rrop-node/27440 "2024-09-09T14:38:26Z")
Hello all! I am currently learning about FX in games, specifically with Unreal engine and am trying to use the flipbook texture nodes in order to create a fire sim for unreal, however I cant seem to get the node to work… --- ## [Labs Texture Flipbook problem](https://realtimevfx.com/t/labs-texture-flipbook-problem/24261)
**Author:** [@PedroV](https://realtimevfx.com/u/PedroV)\ **Replies:** 2\ **Last updated:** [September 15, 2023, 1:08pm UTC](https://realtimevfx.com/t/labs-texture-flipbook-problem/24261 "2023-09-15T13:08:11Z")
Hi everyone! I´m testing the workflow between Houdini- Unreal and I´m stuck with a problem with the labs node for flipbook textures. The problem is that sometimes doesn´t export anything at all and when It does the tex… --- ## [Labs Flipbook doesn't render any textures of spreading fire](https://realtimevfx.com/t/labs-flipbook-doesnt-render-any-textures-of-spreading-fire/22508)
**Author:** [@akkihabara](https://realtimevfx.com/u/akkihabara)\ **Replies:** 1\ **Last updated:** [April 12, 2023, 10:31am UTC](https://realtimevfx.com/t/labs-flipbook-doesnt-render-any-textures-of-spreading-fire/22508 "2023-04-12T10:31:54Z")
Hey, I have a simple fire-spreading setup: I want to render it as a flipbook but it renders only a Normal map, neither Final Color, nor MDC etc. Other Pyro setups render fine but I need a spreading fire as well. Unf… --- ## [Need help building a little bit of steam with a smoke/plasma effect](https://realtimevfx.com/t/need-help-building-a-little-bit-of-steam-with-a-smoke-plasma-effect/21372)
**Author:** [@Hambo](https://realtimevfx.com/u/Hambo)\ **Replies:** 0\ **Last updated:** [October 22, 2022, 1:16pm UTC](https://realtimevfx.com/t/need-help-building-a-little-bit-of-steam-with-a-smoke-plasma-effect/21372 "2022-10-22T13:16:44Z")
Hey guys, Well I thought id hop around and make my first post after consulting a few VFX friends who all highly recommended this forum for all things VFX, so hopefully it works out good! Ive been stuck for the best par… --- ## [VAT texture map not working](https://realtimevfx.com/t/vat-texture-map-not-working/20238)
**Author:** [@alexmont](https://realtimevfx.com/u/alexmont)\ **Replies:** 6\ **Last updated:** [June 16, 2022, 11:46am UTC](https://realtimevfx.com/t/vat-texture-map-not-working/20238 "2022-06-16T11:46:56Z")
Not sure why this is so difficult but inside Houdini my character UV’s are fine. I export the mesh out as a VAT softbody into UE5 and when I hookup the material its does not map correctly. What am I doing wrong? --- ## [Houdini VAT has some shading errors on UE5](https://realtimevfx.com/t/houdini-vat-has-some-shading-errors-on-ue5/19942)
**Author:** [@Carmelo](https://realtimevfx.com/u/Carmelo)\ **Replies:** 0\ **Last updated:** [May 7, 2022, 8:06pm UTC](https://realtimevfx.com/t/houdini-vat-has-some-shading-errors-on-ue5/19942 "2022-05-07T20:06:58Z")
Hi! I’m doing some VAT destruction from Houdini to Unreal and just found an issue and need some help to see if I can fix this. For the material inside Unreal, I’m just using a plain color with some roughness. Thing is, … --- ## [Version comparison](https://realtimevfx.com/t/version-comparison/19556)
**Author:** [@rhorseman92](https://realtimevfx.com/u/rhorseman92)\ **Replies:** 3\ **Last updated:** [March 23, 2022, 5:15pm UTC](https://realtimevfx.com/t/version-comparison/19556 "2022-03-23T17:15:45Z")
Hello everyone! The company that I work for is interested in acquiring a license for Houdini CORE but I would like to know if this version supports the usage of sidefx labs, in particular vertex animation texture export… --- ## [Houdini Vertex Animation Texture Normal Map issue in UE4](https://realtimevfx.com/t/houdini-vertex-animation-texture-normal-map-issue-in-ue4/15807)
**Author:** [@SeanGobey](https://realtimevfx.com/u/SeanGobey)\ **Replies:** 6\ **Last updated:** [September 30, 2021, 4:41pm UTC](https://realtimevfx.com/t/houdini-vertex-animation-texture-normal-map-issue-in-ue4/15807 "2021-09-30T16:41:15Z")
Hi All, I hope you’re having a great start to the new year! Is anyone here having trouble getting normal maps working with VAT? I have everything working EXCEPT for normal maps. I’m using UE4.26. Here’s a vid of the i… --- ## [Electric Shock Effect](https://realtimevfx.com/t/electric-shock-effect/17262)
**Author:** [@Murokun](https://realtimevfx.com/u/Murokun)\ **Replies:** 18\ **Last updated:** [July 14, 2021, 1:56am UTC](https://realtimevfx.com/t/electric-shock-effect/17262 "2021-07-14T01:56:08Z")
https://youtu.be/25Z7-dMFBQU I created the electric shock effect with a Vertex Animation Texture exported in Houdini. I want to solve the problem that the drawing goes wrong when I move the character. If anyone know… --- ## [FireBall Houdini Help?](https://realtimevfx.com/t/fireball-houdini-help/17312)
**Author:** [@Eznaex](https://realtimevfx.com/u/Eznaex)\ **Replies:** 3\ **Last updated:** [July 1, 2021, 10:07am UTC](https://realtimevfx.com/t/fireball-houdini-help/17312 "2021-07-01T10:07:44Z")
Hi! First post here. So I’m working on creating a fireball effect in ue4, i am creating the impact effect inside houdini, the issue im having is i cant figure our how to make the smoke dissapear at the sa… --- ## [VAT Flip rotation problem in unreal](https://realtimevfx.com/t/vat-flip-rotation-problem-in-unreal/14855)
**Author:** [@clem462](https://realtimevfx.com/u/clem462)\ **Replies:** 3\ **Last updated:** [October 8, 2020, 11:15am UTC](https://realtimevfx.com/t/vat-flip-rotation-problem-in-unreal/14855 "2020-10-08T11:15:06Z")
Hello everyone ! hope you doing well ! I recently jump into unreal, and i have an issue with VAT fluid from houdini. Impossible for me to rotate my sim inside my particule system. I miss Something … if the particule… --- ## [New computer and now Houdini not rendering oceans](https://realtimevfx.com/t/new-computer-and-now-houdini-not-rendering-oceans/13908)
**Author:** [@Jordi\_Navarrete](https://realtimevfx.com/u/Jordi_Navarrete)\ **Replies:** 16\ **Last updated:** [August 3, 2020, 4:43am UTC](https://realtimevfx.com/t/new-computer-and-now-houdini-not-rendering-oceans/13908 "2020-08-03T04:43:56Z")
Hi Everyone! I have installed an apprentice version of Houdini in an old machine and everything works fine (but so slow :frowning:) So, I bought a new computer. AMD Ryzen Threadripper and Nvidia RTX. Then installing th… --- ## [Simple Baker problem with alpha channel](https://realtimevfx.com/t/simple-baker-problem-with-alpha-channel/11414)
**Author:** [@dmaruschenko](https://realtimevfx.com/u/dmaruschenko)\ **Replies:** 4\ **Last updated:** [July 2, 2020, 10:16pm UTC](https://realtimevfx.com/t/simple-baker-problem-with-alpha-channel/11414 "2020-07-02T22:16:05Z")
Hi everyone I started tutor VAT PAINTSPLAT by Partikel and I have an issue with Simple Baker, it doesn’t bake the alpha channel How it looks in tutorial I use Houdini Apprentice 18.0.287 SideFX Labs 317 Has an… --- ## [Houdini - Mesh fracturing preparations](https://realtimevfx.com/t/houdini-mesh-fracturing-preparations/12785)
**Author:** [@BinaryBobby](https://realtimevfx.com/u/BinaryBobby)\ **Replies:** 2\ **Last updated:** [May 5, 2020, 7:30am UTC](https://realtimevfx.com/t/houdini-mesh-fracturing-preparations/12785 "2020-05-05T07:30:02Z")
Hi everyone! I have been trying to prepare some fractured meshes for use within UE4. What i’m hoping to do is basically take any mesh (let’s say a sphere) fracture it and then control the chunks with the shader in UE4, … --- ## [Houdini - UE4 VAT mesh particles normals](https://realtimevfx.com/t/houdini-ue4-vat-mesh-particles-normals/8937)
**Author:** [@Strynx](https://realtimevfx.com/u/Strynx)\ **Replies:** 9\ **Last updated:** [April 30, 2020, 1:54am UTC](https://realtimevfx.com/t/houdini-ue4-vat-mesh-particles-normals/8937 "2020-04-30T01:54:28Z")
Hello there, I’m having problems with the normals in the vertex animation texture workflow from houdini to UE4. I’m more or less following this tutorial : I’ve already had trouble with the exported normals… --- ## [Houdini Question: How to leverage unreal vertex paint within houdini asset?](https://realtimevfx.com/t/houdini-question-how-to-leverage-unreal-vertex-paint-within-houdini-asset/12698)
**Author:** [@Sam](https://realtimevfx.com/u/Sam)\ **Replies:** 0\ **Last updated:** [April 28, 2020, 3:35am UTC](https://realtimevfx.com/t/houdini-question-how-to-leverage-unreal-vertex-paint-within-houdini-asset/12698 "2020-04-28T03:35:52Z")
Hey everyone! I have been devoting myself to learning Houdini recently and I am coming up short trying to implement what I feel like is a simple thing. I am sure I am missing something along the way and was hoping some… --- ## [Problem with rendering in Houdini](https://realtimevfx.com/t/problem-with-rendering-in-houdini/10896)
**Author:** [@Hovl](https://realtimevfx.com/u/Hovl)\ **Replies:** 2\ **Last updated:** [October 21, 2019, 11:22pm UTC](https://realtimevfx.com/t/problem-with-rendering-in-houdini/10896 "2019-10-21T23:22:31Z")
I just started using Houdini and am trying to render explosion. But fire doesn’t render. How to make explosion on .png the same as on the camera? --- ## [Houdini -\> Unity - packed channel shader](https://realtimevfx.com/t/houdini-unity-packed-channel-shader/10652)
**Author:** [@seiberling](https://realtimevfx.com/u/seiberling)\ **Replies:** 1\ **Last updated:** [October 5, 2019, 9:26pm UTC](https://realtimevfx.com/t/houdini-unity-packed-channel-shader/10652 "2019-10-05T21:26:09Z")
I’ve been following this excellent tutorial for channel packing an explosion flipbook in Houdini. The tutorial includes shader set up in Unreal. Can someone point me to either a shader for Unity or a resource for setti… --- ## [2D Motion vector from Houdini?](https://realtimevfx.com/t/2d-motion-vector-from-houdini/4904)
**Author:** [@meta\_t](https://realtimevfx.com/u/meta_t)\ **Replies:** 6\ **Last updated:** [July 16, 2019, 3:38pm UTC](https://realtimevfx.com/t/2d-motion-vector-from-houdini/4904 "2019-07-16T15:38:00Z")
Hello ! Sorry if feels like double post, I longly hesitated to continue the motion vectors thread or start a new one, but since it’s quite houdini , I didn’t wanted to flood the other thread. :thinking: SO ! since Houd… --- ## [Houdini - TOP / PDG pyro wedging](https://realtimevfx.com/t/houdini-top-pdg-pyro-wedging/9141)
**Author:** [@meta\_t](https://realtimevfx.com/u/meta_t)\ **Replies:** 3\ **Last updated:** [May 22, 2019, 2:53pm UTC](https://realtimevfx.com/t/houdini-top-pdg-pyro-wedging/9141 "2019-05-22T14:53:32Z")
Hello there ! Does anyone managed to wedge pyro sim with Tops ? I tried to figure out how to do very basic wedging on parameters like turbulence ect, saving the sim file, then render it in Mantra. Somehow I never been… --- ## [Houdini Game Dev tools texture sheet problem](https://realtimevfx.com/t/houdini-game-dev-tools-texture-sheet-problem/8044)
**Author:** [@Ocfenton](https://realtimevfx.com/u/Ocfenton)\ **Replies:** 4\ **Last updated:** [March 8, 2019, 5:52pm UTC](https://realtimevfx.com/t/houdini-game-dev-tools-texture-sheet-problem/8044 "2019-03-08T17:52:19Z")
Hello This is a post I have put up in the SideFX forum but it is waiting for approval and I thought posting it here would help find a solution to me problem. I have been working in Houdini for my final major project. … --- ## [Houdini - Slow/unstable cop network](https://realtimevfx.com/t/houdini-slow-unstable-cop-network/8006)
**Author:** [@meta\_t](https://realtimevfx.com/u/meta_t)\ **Replies:** 3\ **Last updated:** [March 5, 2019, 6:53pm UTC](https://realtimevfx.com/t/houdini-slow-unstable-cop-network/8006 "2019-03-05T18:53:47Z")
Hello ! I’m using a lots of COP network for creating looping flipbook or generate fluid threshold maps. But they seems quite unstable or really slow at best when dealing with 512/1024 sequences. Is there a way to disabl… --- ## [Houdini RBD Simulation to Unreal Issues - SOLVED](https://realtimevfx.com/t/houdini-rbd-simulation-to-unreal-issues-solved/6930)
**Author:** [@mr.pitz](https://realtimevfx.com/u/mr.pitz)\ **Replies:** 7\ **Last updated:** [December 20, 2018, 10:51am UTC](https://realtimevfx.com/t/houdini-rbd-simulation-to-unreal-issues-solved/6930 "2018-12-20T10:51:44Z")
Hey guys. I’ve got some problem getting my very simple “falling tree” simulation working correctly in Unreal via Vertex Animatio Textures. The exported simulation seems to be offset or something ¯\_(ツ)\_/¯ In Houdini I’ve… --- ## [Houdini Explosion Simulation/Looping Help](https://realtimevfx.com/t/houdini-explosion-simulation-looping-help/6848)
**Author:** [@Kanoba](https://realtimevfx.com/u/Kanoba)\ **Replies:** 9\ **Last updated:** [December 13, 2018, 4:30am UTC](https://realtimevfx.com/t/houdini-explosion-simulation-looping-help/6848 "2018-12-13T04:30:26Z")
Hey guys im looking for abit of feedback/Help with creating Texture sheets from houdini simulations. This is what ive come up with so far for the effect im currently working on. Im quite new to houdini but so far its … --- ## [Houdini Scatter point per group?](https://realtimevfx.com/t/houdini-scatter-point-per-group/5942)
**Author:** [@DeepSpaceBanana](https://realtimevfx.com/u/DeepSpaceBanana)\ **Replies:** 1\ **Last updated:** [September 28, 2018, 12:23am UTC](https://realtimevfx.com/t/houdini-scatter-point-per-group/5942 "2018-09-28T00:23:46Z")
Hey guys, anyone know how I can add one point at the center of each group in houdini? Below you can see each group primitive visualized, what I want to do is add one point at each group’s center. I think I can probably d… --- ## [Houdini Texture Sheet help](https://realtimevfx.com/t/houdini-texture-sheet-help/5886)
**Author:** [@gponzini](https://realtimevfx.com/u/gponzini)\ **Replies:** 3\ **Last updated:** [September 24, 2018, 6:06am UTC](https://realtimevfx.com/t/houdini-texture-sheet-help/5886 "2018-09-24T06:06:08Z")
I’m getting mad trying to make work the Texture Sheet node of Houdini FX, following the Pyro Channel Packing video tutorial. I create a basic pyro fireball, laying a Torus and a Fireball Pyro stuff. Then, inside the Py… --- ## [Facture houdini](https://realtimevfx.com/t/facture-houdini/5429)
**Author:** [@clem462](https://realtimevfx.com/u/clem462)\ **Replies:** 3\ **Last updated:** [August 22, 2018, 7:16am UTC](https://realtimevfx.com/t/facture-houdini/5429 "2018-08-22T07:16:40Z")
Hello ! I must use houdini for one little destruction and … i am noobie in this soft, My props artiste give me a max project with my prop, i export him to fbx, then i import him in houdini. when i want to do a vor… --- ## [Need Help With A WetMap Project Houdini](https://realtimevfx.com/t/need-help-with-a-wetmap-project-houdini/5379)
**Author:** [@darrianb](https://realtimevfx.com/u/darrianb)\ **Replies:** 7\ **Last updated:** [August 13, 2018, 3:18pm UTC](https://realtimevfx.com/t/need-help-with-a-wetmap-project-houdini/5379 "2018-08-13T15:18:28Z")
Hello guys, I am struggling with a project that I really need help on applying a wet map image to a project in Houdini I seriously need some help can anyone help me? [Next page](https://realtimevfx.com/c/technical/houdini/54.md?page=1)