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Found 92 results

  1. Spectra Mask removing/Masking the Foam

    Hey guys, Basically my foam/whitewater is being deleted when the flip tank moves across Guided Ocean layer. The foam is cached correctly as the particles are there so I'm guessing its a problem with the OceanShader or rendering? Just as the boat hits the big wave the whitewater map is deleted. Its hard to tell but it seems to be happening through the whole shot. Any ideas how to fix this? H16.0 Mantra Edit. After playing a bit I think it's the Spectra Mask removing/Masking the FoamParticles input. Is there a fix or way around this? Thanks for the help, I'm new to Houdini as I've been learning it the last year when I can so sorry if the above is not worded correctly. Steve Fix.mov
  2. Large scale beach probleme

    Hi, I'm working on a shot with a beach about 500m long, we can see the wave along the beach, I'm not sur if I should simulate the water. It's too big this scene. Anyone knows or have any ideas about it? How I can get this effect? Sorry for my poor english. Thanks
  3. shelf_beach_compare_shader_test.zipshelf_beach_compare_shader_test.zipshelf_beach_compare_shader_test.zipshelf_beach_compare_shader_test.zipI am trying to use the default beach tank and do a test render but I found out some area of the surface like the water droplets are a lot darker than the rest of the water. I tried increasing the refraction and reflection limit and the displacement bound but it didn't help with the issue. It's looks fine if the refraction is at 1 when everything is transparent but it's not the look I was looking for. Does anyone know how to fix it? shelf_beach_compare_shader_test.zip
  4. Hi guys, I was about to make an effect of two ocean wave collide and combine together. But I have no idea where to begin. Someone who is interested in or have some idea please help me, give me some suggestion. Thanks a lot.
  5. Ocean - no displacement with Deadline

    Probably a stupid question but i'm not a mantra user... I'm currently rendering an ocean in Mantra on our farm with Deadline. I've written out the ocean spectra, foam etc and everything renders correctly on my box. I'm then submitting an IFD generation job and a mantra job (frame dependent on the IFDs) however it renders without any displacement on the ocean...
  6. Hello Guys. I have a problem with meshing FLIP when flattening for ocean displacement. There's visible popping by one frame in refraction when geometry is coming out of water. Here's preview: And here's what's going on with mesh on one frame and next one: Anyone have any idea how to fix that problem? I've tried many solutions but without success. - Narrow Band is turned off - I tried subtracting collision geo from mesh but it doesn't work - Without flattening there's no problem because of the boundry, water has thickness and it's meshed together with space around collision object. If anyone have a workflow for meshing that kind of ascending, I would be very grateful for any sugestions. And if that will help, I'm sharing .hip file without cache files. flip_ocean_rnd_v004.hiplc
  7. It's my first time to work water. So I have some questions when rendering and compositing. I use guided ocean layer to integrate ocean surface and flip simulation. I think the best way is that I seperate render ocean surface and guided layer fluid extended surface, then composite both with touching the boundary. pleas give me some tips for blending two surface.
  8. Hi everyone, I am searching for a way to export ocean geometry from houdini without using displacement (because I must render it after with octane and octane is terrible handling displacement), the idea is to export real geometry instead of displacement maps as you would do normally. Sort of combining the ocean evaluate (simulated area) with the ocean preview (out of ocean spectra) meshes in one mesh (see pictures attached) Can someone help me on how to do that ? Thanks
  9. Hi everyone! I am having an issue with rendering my ocean using Mantra in Houdini. It appears really blocky and I cannot figure out why! This is my first time trying to use the Houdini ocean tools so sorry if my explanation isn't great but I will try and explain my scene. I have cached out my guided ocean simulation and used it to create an extended ocean so it is definitely an issue with the creation of the extended ocean. I have tried so many different settings to try and solve this issue and nothing seems to reduce it at all. So far I have tried changing these settings in the particlefluidsurface node: - lowering particle separation to 0.06 - lowering voxel scale to 0.1 - lowering the influence scale to 2 - increasing the extrude divisions I have attached a render to show the weird blockiness I mean, it can't even see where these divisions would be coming from in the mesh! Anyone have any idea what else I can try or why this is happening??
  10. Ocean warp

    Hi guys, I was wondering whether anyone has idea how to simulate ocean on a non grid-like geo, for example: this It was shown in houdini 16 "what's new video" but I have no idea how to even start with this. Any dircetions would be awesome!
  11. Houdini Whitewater

    Hello, Masters I just going through a small problem but it is actually big for me. So, can you tell me how to produce whitewater like the image I have attached below. Because my whitewater sim do not create that spash like effect on top of the wave.
  12. Hello! I try to render an ocean with foam. I've got weird results always whenever I put down manualy the oceanfoam sop and link it the cached particles to the oceanSurface shader's oceanfoam particles path. What you can see in the picture that I linked is that first I clicked on the “Small Ocean” from the shelf tool, that puts down automaticly the ocean foam SOP and also creates the link on the oceansurface shader. That renders with no problem. After that I moved the camera, recached the oceanfoam (from the camera) I disabled the link and point on the path of the particles manually, and after that the render is destroyed. It creates these spike artifacts. I made this workflow only for demonstration purpose, to show that whenever the link for the oceanfoam path is made manualy I got this weird render result. Does anyone have any idea what Im missing??? Thank you.
  13. Hi everyone, I'm trying to simulate a cruise moving across the ocean. I did few tests but haven't get the result I'm looking for. I need some help and advice from the community. Here are two of tests I did: FLIP tank size:130*15*140 Particle Sep: 0.15 Grid Scale: 2 The first with Reseeding On, the second one with reseeding off. https://vimeo.com/259249552 https://vimeo.com/259249724 Not sure which part went wrong in my settings. Both videos have FLIP particles pushed out so much and unable to maintain the shape it should be. Here is the image similar to what I'm looking for. I also attached the hip file. B_cruise_11_a.hiplc
  14. I'm using the Ocean Flat Tank Shelf tool to do a flip sim, and then render an extended ocean with the ocean displacement tools. Basically, trying to follow along with the example shown in the Houdini 16 Ocean tools masterclass. The issue I'm having is, when I use the Flattening tools on the particlefluidsurface sop, I get a lot of extra geometry below the surface. The default Extrude Polygons mode is planar and I get a lot of planes below the surface. If I change to Along Each Axis, I get the extra geo planes above the surface as well. Has anyone run into this issue? I didn't really change any simulation settings on the flattank_sim from what the shelf tool set up. I suppose it's possible the new narrow band settings are somehow breaking the flatten geometry tools? I should test with the narrow band turned off maybe but I would hope that wouldn't break the setup. I'm hoping someone else has seen this before and found a solution.
  15. Hi there, Where can we control the quality (subdivisions) of displacement using ocean spectrum? The image is from the same scene but when camera comes near (2 meters) the ocean we can see lack of subdivisions on displacement. I've already tried resolution exponent to 11 under ocean spectrum, dicing at 2 under mantra settings but it comes always with these squares. I'll keep diging, but meanwhile if you have some tip, please shoot Cheers
  16. Hi there, I'm learning how to make guided ocean layer sims and I have a couple of questions: 1 - I'm not familiar with caching system from Houdini. In my guidedoceanlayer_sim I have output name - $HIP/sim/$HIPNAME.`opname("..")`.$SF.sim - first newb question, should I use .sim or .bgeo? 2 - I've copied that name and after saving to disk, I 've pasted as relative references under DOP Network - playback simulation. I should see the sim, but I only see last frame of the sim and a bounding box around boat 3 - Under Ocean Source wavetank I have this expression under center - centroid("../mergefollow", D_Z) - How can I add or subtract a value since I don't need so much detail in the front of the boat and need more at it's back I'm learning Houdini so please be gentle. Thanks!
  17. I want to displace the ocean with a deformed grid,, but the displacement of the white caps and foam are being stretched and look wrong due to the deformer,look like this picture ,how can I fix it.
  18. I want to do a marine vortex effect in the Houdini, but in the actual production of the rotating force field to add to the fluid to drive fluid, found that the fluid will be dumped over time, which makes me very distressed, also do not know how to solve, I hope someone can help me, there is no information to learn! Thank you
  19. Hope this in the right section, it's a bit of both effects and lighting/shading! I am working on a shot that involves an ocean surface in overcast lighting and I'm really struggling to get it right. I am aiming for something like the attached image but my attempts have come out looking way too glossy/specular by comparison. When I try to push the overcast lighting, I also run in to the problem of the scene really flattening out. How do I keep the detail and contrast in the waves without any bright highlights? I am currently working with mantra but hope to switch to htoa. Thank you!
  20. I am trying to export flip sim from H to maya in Houdini 16.If I get it right,I have to export mesh,with flatened geometry ,like alemic,for example,and displacement with baked masks and ocean spectrum like exr ,for example,but I cant make it work.Can anyone help me? Thank you!
  21. Arnold, houdini, ocean

    Hi I`m trying to render ocean surface with Arnold in Houdini. But I just can\t get the transparency to work. In maya there`s checkbox Opaque for the render grid. I can`t seem to find it in Houdini. Thanks in advance Janis
  22. Ugly artefacts

    Hey, got a pretty annoying problem. A certain area of my ocean always gets some artefacts. The dark area isn't responding to AA blur, geometry input etc. Rght behind that its okay again. ANY idea whats the problem here?
  23. Ocean mesh flickering problem

    Hi, Here is my WIP for a deformed wave. I need some feedback on this. The ocean surface is flickering quite a bit, what's causing this problem and how should i go about fixing? Is this a shading problem or something else entirely? Thanks
  24. Ocean sim help

    I am working with an ocean sim using flip container. I created a static object that is colliding but the water that is created as a result of the collision is very thick. Its like 5-10 feet thick instead of particle or paper thin. how do I make the water thinner?
  25. Ocean sim help

    I am working with an ocean sim using flip container. I created a static object that is colliding but the water that is created as a result of the collision is very thick. Its like 5-10 feet thick instead of particle or paper thin. how do I make the water thinner?
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