> [!abstract] Summary > **Environment workflow notes for Houdini / Solaris** — set dressing, scattering and instancing techniques, with sourced references. **Tip:** use the Reference node as a payload to load assets only when seen through the camera (instanceable). > [!info] Source > Compiled with **AlterAI Bot** from multiple references (linked below). --- Use reference node as payload to load asset only when seen through camera, and you can make it instancable Made with AlterAI Bot # Sources :  1. youtube youtube.com/watch?v=P_qmfy… Houdini Illume: Controlled Scattering - YouTube Learn how to take scattering to the next level with a fully procedural yet highly controllable approach. By utilizing Houdini's scatter and align tools, we ensure precise placement while avoiding penetration using a multi-step process. Gain full artistic control over asset distribution, measure object sizes dynamically, and finalize your scene with a render setup in Solaris. AGENDA 0:00 Welcome 0:55 Introduction 4:50 Proceduralism Primer 13:30 Houdini Exercises [Originally Aired Monday, March 10, 2025]  2. sidefx.com sidefx.com/docs/houdini/s… Solaris and Karma - SideFX Introduces a number of USD concepts, and how they relate to Houdini's USD support. How Solaris LOP (lighting operator) nodes work to generate/modify USD. Guide to using the user interface to interact with LOP networks and USD data. How to use the USD primitive matching syntax. Describes the differences/enhancements in the Solaris viewer compared to the Houdini object/SOP viewer. Improving interactive workflows in Solaris. Useful scenes and assets for learning Solaris and USD. Details of how... 3. squarespace static1.squarespace.com/static/6182ef6… Houdini . ∠ Nodes ∠ Geometry nodes ∠ Scatter and Align geometry node Scatters points across a surface with randomized scale and orientation attributes for use with Copy to Points. Coverage set to 1.0 Coverage set to 0.5 Scattering around constraint points with avoid constraint points but without remove overlapping points. Scattering around constraint points with avoid constraint points and remove overlapping points. Scattering around constraint points without avoid constraint points or remove overlapping points. Scattering around...  4. youtube youtube.com/watch?v=1ZfYhg… It's All in the Name | Jeff Wagner | Houdini Illume Everything you wanted to know about the Name Attribute - and so much more. PLUS - interviews with MOPs co-founder Henry Foster - and Entagma's Moritz Schwind. Topics covered: - Name attribute introduction - Combining Name attribute and Path - Packed Primitives and Name - Materials and Name - SOP tools and Name - RBD and Name - Packed Primitives and Name - KineFX and Name - Create a SOP viewport state to work with the name attribute - Solaris and Name - Tools using Name: Labs Building Generator - Tools using Name: MOPs FILES: <http://sidefx.co/202102-Illume-Name-Files>  5. youtube youtube.com/watch?v=_lCFA7… Instancing Variation and The Solaris Instancer: Instancing Part 2 - Handy Houdini Tips In this part we are looking at the attributes required for instancing and copying with a focus on variation. For this we are starting with the basics of using attribute noises and then going more in depth with indexing attributes and Solaris instancing. 00:00 Intro 01:00 Setup 03:00 Point Scattering 04:45 Basic Attribute Variation 09:30 Solaris Instancer Basics 13:05 Index/Species Attributes 18:43 Solaris Collections and Indexed Instancing 22:28 Overview of Indexed Instancing 24:12 Practical Example - Xiaomi Project 24:45 Outro  6. sidefx.com sidefx.com/docs/houdini/s… Performance Tips - SideFX On this page Some general tips and suggestions to help improve performance while working in Solaris. Tip The list will certainly evolve over time as Houdini, USD and Hydra continue improving. High numbers of primitives can slow down USD and Hydra, particularly in cases of hundreds or thousands of sibling primitives. Where possible, try consolidating Mesh primitives, and use GeomSubsets to bind materials to different parts of the mesh. It is good practice to group primitives underneath a single...  7. youtube youtube.com/watch?v=GcOwhJ… Getting Started with the Layout LOP | Houdini 19 - YouTube The Layout LOP is going to be the go to tool for set dressing your scenes in Solaris. It does have some weird quirks and takes some getting use to which is why in this video we take a look at how to get started with the layout lop in Houdini 19. Leave a like and a favorite if you enjoyed. Subscribe if you want to. Please let me know what you thought of the video. Join my Discord here: <https://discord.gg/vssZxjN> Follow me- <https://insidethemind.space/> <https://twitter.com/StormzEdits> <https://www.instagram.com/mindofstormz/> <https://www.artstation.com/matt_ekstrom>  8. sidefx.com sidefx.com/forum/post/410… Solaris - Layout Node with different Variants | Forums - SideFX Klonkel Member 79 posts Joined: March 2016 Offline Hello, So I am currently diving into lops, and managed to setup some sort of procedural way of creating USD assets, which are very easy to place in the scene with the layout LOP. But I wonder if there's a way to randomly place variants with the layout LOP. So instead of having a seperate asset for each variant, can the layout lop randomly distribute (or procedurally) variants? I already found the asset reference node of the asset inside the...   9. sidefx.com sidefx.com/forum/topic/73… # Stage Manager – Set Dressing: Transform/Rotation Attribute? | Forums Hi, I found using the edit function to layout USD assets is pretty hard to control. I feel Stage Manager is easier to manage. But is there a way to enter X, Y, Z transform values anywhere, like in Maya? If Stage Manager simply had some kind of transform/rotation channel boxes, it would be great. Please let me know if there is a solution. - Houdini Illume: Controlled Scattering <iframe width="560" height="315" src="https://www.youtube.com/embed/P_qmfyW--Ws?si=yMAjWfty0Sedtxas" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe> --- # Environment Set Dressing and Scattering in Houdini Solaris: Quick and Optimized Workflow To create a complete environment in Solaris with set dressing and scattering, here is the quickest and most optimized workflow for your graduation short film, strictly following OSMIUM1 conventions. # 1. Asset Preparation Phase # USD Asset Structure - **OSMIUM naming:** `asset_objectName_v001.usd` - **Recommended hierarchy:** `/assets/environment/props/` or `/assets/environment/vegetation/` - Use **Component Builder** to create your USD assets with variants and materials. # Asset Organization text `/assets/ ├── environment/ │ ├── props/ │ │ ├── asset_rock_v001.usd │ │ ├── asset_tree_v001.usd │ │ └── asset_flower_v001.usd │ └── terrain/ │ └── asset_ground_v001.usd` # 2. Optimized Set Dressing Workflow # A. Point Instancer Method (Recommended for Performance) 1. **Create your base terrain:** - **SOP Create** → Terrain or grid - **SOP Import** → Import your terrain geometry from SOPs 2. **Scattering and attribution:** - Use the **Scatter and Align** node in SOPs to create points. - Add attributes like `@pscale`, `@orient`, `@Cd` for variation. - **Important:** Use the `@name` attribute to identify different asset types. 3. **Instancing in Solaris:** - Use the **Instance to Points LOP**. - Set **Prototype Source** to "Second Input". - Use **Point Instancer** method for performance. # B. Point Instancer Configuration python `# In an Attribute Wrangle on scatter points string species[] = {"rock", "tree", "flower"}; i@index = int(rand(@ptnum) * len(species)); s@name = species[i@index];` # 3. Multi-Object Scattering Workflow # Creating Collections for Instancing 1. **Create Collections:** - Use **Collection LOP** to group assets by type. - Collection "vegetation": `/assets/environment/vegetation/*` - Collection "props": `/assets/environment/props/*` 2. **Instance Configuration:** - **Prototype Primitives:** `%vegetation_collection` (Solaris syntax) - **Prototype Index:** Set to "Random" or use the `i@index` attribute. # Advanced Scattering with Controls python `# Control density by height map f@density = fit(f@height, 0, 1, 0.1, 1.0); f@pscale = fit(f@slope, 0, 1, 0.5, 1.2);` # 4. Performance Optimization # Performance Strategies 1. **Limit Primitives:** - Avoid overly deep hierarchies. - Use **GeomSubsets** for material assignments. - Limit the number of sibling primitives. 2. **Viewport Optimization:** - Use the **Purpose** attribute for controlling visibility. - Adjust **Scene Polygon Limit** in preferences. - Use **Distance-Based Geometry** for detail management. # Memory and Viewport Management python `# Attribute to control Level of Detail f@lod = fit(distance(@P, @camerap), 0, 100, 1, 0.1);` # 5. Layout and Editing Workflow # Layout LOP for Manual Placement 1. **Layout LOP:** - **Asset Gallery:** Define your available assets. - **Brush System:** Interactive placement. - **Variant Support:** Random selection of variants. 2. **Stage Manager (Alternative):** - Direct manipulation with handles. - **Transform Channels** for precise value entry. # 6. Material Integration and Shading # Automatic Assignment by Name python `# In Material Assignment LOP string name = usd_name(0, s@primpath); string mats = "/materials/"+name; usd_addrelationshiptarget(0, s@primpath, "material:binding", mats);` # Centralized Material Library - Use a single **Material Library LOP** after merging. - Use **Autofill Materials** for automatic assignment. - Organize by collections: `/materials/vegetation/`, `/materials/props/`. # 7. Example of a Complete Workflow text `1. SOP Create → Terrain 2. Scatter and Align → Points with attributes 3. Instance to Points LOP → Instancing 4. Collection LOP → Asset grouping 5. Material Library LOP → Shaders 6. Assign Material LOP → Assignment 7. Layout LOP → Manual adjustments 8. Render Setup → Karma/RenderMan` # 8. OSMIUM-Specific Optimization # Naming and Documentation - **Nodes:** `scatter_vegetation_v001`, `instancer_props_v001` - **USD Paths:** `/shots/shot010/environment/vegetation` - **Document** all parameters in Prism. - **Strict versioning** for all assets. # Performance Tips - Use **Payloads** for heavy assets. - Use **Proxies** for fast layout editing. - **Cull** by camera distance. - Prefer **Instancing** over **Copying** for performance. # 9. Common Troubleshooting [[Houdini LOD Creation]] # Frequent Issues 1. **Lost materials:** Check binding paths. 2. **Slow instancing:** Reduce number of prototypes. 3. **Viewport lag:** Adjust Scene Polygon Limit. 4. **Memory issues:** Use Purpose and Culling. --- Let me know if you want the YouTube video text or further condensed explanations on any section. Cette approche vous donnera un workflow professionnel, optimisé et conforme OSMIUM pour votre court métrage de fin d'études. La clé est de bien structurer vos assets en amont et d'utiliser l'instancing USD natif pour les performances[13](https://j-cube.jp/solutions/multiverse/docs/usage/point-instancing-solaris.html)[14](https://lucascheller.github.io/VFX-UsdSurvivalGuide/pages/dcc/houdini/fx/pointinstancers.html). 1. [https://www.youtube.com/watch?v=P_qmfyW--Ws](https://www.youtube.com/watch?v=P_qmfyW--Ws) 2. [https://www.sidefx.com/docs/houdini/solaris/index.html](https://www.sidefx.com/docs/houdini/solaris/index.html) 3. [https://static1.squarespace.com/static/6182ef6ed4ff3038bd6736d4/t/6184c52503dc890579e97420/1636091174975/ScatterAndAlign.pdf](https://static1.squarespace.com/static/6182ef6ed4ff3038bd6736d4/t/6184c52503dc890579e97420/1636091174975/ScatterAndAlign.pdf) 4. [https://www.youtube.com/watch?v=1ZfYhgbsjRY](https://www.youtube.com/watch?v=1ZfYhgbsjRY) 5. [https://www.youtube.com/watch?v=_lCFA7N0tRk](https://www.youtube.com/watch?v=_lCFA7N0tRk) 6. [https://www.sidefx.com/docs/houdini/solaris/performance.html](https://www.sidefx.com/docs/houdini/solaris/performance.html) 7. [https://www.youtube.com/watch?v=GcOwhJ9M7H8](https://www.youtube.com/watch?v=GcOwhJ9M7H8) 8. [https://www.sidefx.com/forum/post/410774/](https://www.sidefx.com/forum/post/410774/) 9. [https://www.sidefx.com/forum/topic/73145/](https://www.sidefx.com/forum/topic/73145/) 10. [https://www.youtube.com/watch?v=1Al4lV0lq20](https://www.youtube.com/watch?v=1Al4lV0lq20) 11. [https://www.sidefx.com/docs/houdini/solaris/about_lops.html](https://www.sidefx.com/docs/houdini/solaris/about_lops.html) 12. [https://www.youtube.com/watch?v=Lwf69klr_uI](https://www.youtube.com/watch?v=Lwf69klr_uI) 13. [https://j-cube.jp/solutions/multiverse/docs/usage/point-instancing-solaris.html](https://j-cube.jp/solutions/multiverse/docs/usage/point-instancing-solaris.html) 14. [https://lucascheller.github.io/VFX-UsdSurvivalGuide/pages/dcc/houdini/fx/pointinstancers.html](https://lucascheller.github.io/VFX-UsdSurvivalGuide/pages/dcc/houdini/fx/pointinstancers.html) 15. [https://help.maxon.net/r3d/houdini/en-us/Content/html/Houdini+Solaris+Intro.html?TocPath=Getting+Started%7CGetting+Started+with+Solaris%7C_____1](https://help.maxon.net/r3d/houdini/en-us/Content/html/Houdini+Solaris+Intro.html?TocPath=Getting+Started%7CGetting+Started+with+Solaris%7C_____1) 16. [https://www.sidefx.com/docs/houdini/nodes/sop/scatteralign.html](https://www.sidefx.com/docs/houdini/nodes/sop/scatteralign.html) 17. [https://www.sidefx.com/tutorials/procedural-assets-scattering-in-unreal-engine-5-with-houdini/](https://www.sidefx.com/tutorials/procedural-assets-scattering-in-unreal-engine-5-with-houdini/) 18. [https://www.sidefx.com/docs/houdini/solaris/](https://www.sidefx.com/docs/houdini/solaris/) 19. [https://www.sidefx.com/forum/topic/55954/](https://www.sidefx.com/forum/topic/55954/) 20. [https://www.youtube.com/watch?v=Ar0pNoSGOd8](https://www.youtube.com/watch?v=Ar0pNoSGOd8) 21. [https://tokeru.com/cgwiki/UsdGuide07.html](https://tokeru.com/cgwiki/UsdGuide07.html) 22. [https://www.youtube.com/watch?v=dH_8GcVkfwg](https://www.youtube.com/watch?v=dH_8GcVkfwg) 23. [https://www.youtube.com/watch?v=XecgXeE8pSY](https://www.youtube.com/watch?v=XecgXeE8pSY) 24. [https://www.reddit.com/r/Houdini/comments/1j2fznu/instancing_confusion/](https://www.reddit.com/r/Houdini/comments/1j2fznu/instancing_confusion/) 25. [https://www.youtube.com/watch?v=bA8mQgSPE0I](https://www.youtube.com/watch?v=bA8mQgSPE0I) 26. [https://www.sidefx.com/tutorials/solaris-scene-creationlighting-workflow-tutorial/](https://www.sidefx.com/tutorials/solaris-scene-creationlighting-workflow-tutorial/) 27. [https://render.otoy.com/forum/viewtopic.php?t=79068](https://render.otoy.com/forum/viewtopic.php?t=79068) 28. [https://www.cgchannel.com/2019/02/master-houdini-randomization-and-scattering/](https://www.cgchannel.com/2019/02/master-houdini-randomization-and-scattering/) 29. [https://www.ask.com/news/demystifying-houdini-solaris-comprehensive-learning-roadmap](https://www.ask.com/news/demystifying-houdini-solaris-comprehensive-learning-roadmap) 30. [https://www.youtube.com/watch?v=dezU8Raoo5U](https://www.youtube.com/watch?v=dezU8Raoo5U) 31. [https://www.reddit.com/r/Houdini/comments/px8kwu/setdressing_with_solaris_stagemanager_how_to_make/](https://www.reddit.com/r/Houdini/comments/px8kwu/setdressing_with_solaris_stagemanager_how_to_make/) 32. [https://www.youtube.com/watch?v=tbzIABrViYg](https://www.youtube.com/watch?v=tbzIABrViYg) 33. [https://www.youtube.com/watch?v=h6MN80ka4Vg](https://www.youtube.com/watch?v=h6MN80ka4Vg) 34. [https://www.youtube.com/watch?v=U79vVDVn1RE](https://www.youtube.com/watch?v=U79vVDVn1RE) 35. [https://www.youtube.com/watch?v=rpQg22GbMwk](https://www.youtube.com/watch?v=rpQg22GbMwk) 36. [https://www.youtube.com/watch?v=4QDS1snHIIo](https://www.youtube.com/watch?v=4QDS1snHIIo) 37. [https://www.youtube.com/watch?v=7n6rlw9Sp7E](https://www.youtube.com/watch?v=7n6rlw9Sp7E) 38. [https://www.youtube.com/watch?v=wmPKaUfDkrk](https://www.youtube.com/watch?v=wmPKaUfDkrk) 39. [https://www.sidefx.com/docs/houdini/nodes/sop/scatter.html](https://www.sidefx.com/docs/houdini/nodes/sop/scatter.html) 40. [https://www.youtube.com/watch?v=Oo5QgqAMpIQ](https://www.youtube.com/watch?v=Oo5QgqAMpIQ) 41. [https://www.youtube.com/watch?v=LBAXQC5maVY](https://www.youtube.com/watch?v=LBAXQC5maVY) 42. [https://www.sidefx.com/forum/topic/94662/](https://www.sidefx.com/forum/topic/94662/) 43. [https://www.youtube.com/watch?v=3xmYbiuiXsI](https://www.youtube.com/watch?v=3xmYbiuiXsI) 44. [https://www.youtube.com/watch?v=aA3xUZscC50](https://www.youtube.com/watch?v=aA3xUZscC50) 45. [https://www.reddit.com/r/Houdini/comments/1b1ozjv/manual_layout_in_solaris_with_usd/](https://www.reddit.com/r/Houdini/comments/1b1ozjv/manual_layout_in_solaris_with_usd/) 46. [https://www.reddit.com/r/Houdini/comments/x5txtc/how_to_efficiently_manage_multiple_scenes_in_one/](https://www.reddit.com/r/Houdini/comments/x5txtc/how_to_efficiently_manage_multiple_scenes_in_one/) 47. [https://www.sidefx.com/forum/topic/77933/?page=1](https://www.sidefx.com/forum/topic/77933/?page=1) 48. [https://www.youtube.com/watch?v=cE-Bbdspu_8](https://www.youtube.com/watch?v=cE-Bbdspu_8) 49. [https://www.youtube.com/watch?v=QqE4HYFDbGk](https://www.youtube.com/watch?v=QqE4HYFDbGk) 50. [https://www.sidefx.com/docs/houdini/nodes/lop/modifypointinstances.html](https://www.sidefx.com/docs/houdini/nodes/lop/modifypointinstances.html) 51. [https://www.sidefx.com/tutorials/craftsman-scene-assembly-cops-lighting-lookdev/](https://www.sidefx.com/tutorials/craftsman-scene-assembly-cops-lighting-lookdev/) 52. [https://www.sidefx.com/docs/houdini/nodes/lop/pointxform.html](https://www.sidefx.com/docs/houdini/nodes/lop/pointxform.html) 53. [https://www.sidefx.com/forum/topic/94012/](https://www.sidefx.com/forum/topic/94012/) 54. [https://www.sidefx.com/docs/houdini/solaris/ui.html](https://www.sidefx.com/docs/houdini/solaris/ui.html) 55. [https://render.otoy.com/forum/viewtopic.php?f=101&t=74703&start=10](https://render.otoy.com/forum/viewtopic.php?f=101&t=74703&start=10) 56. [https://www.youtube.com/watch?v=M1Mw8xcgCrY](https://www.youtube.com/watch?v=M1Mw8xcgCrY) 57. [https://www.youtube.com/watch?v=fHJpUdl45ec](https://www.youtube.com/watch?v=fHJpUdl45ec) 58. [https://www.sidefx.com/forum/topic/37286/](https://www.sidefx.com/forum/topic/37286/) 59. [https://www.sidefx.com/docs/houdini/nodes/sop/name.html](https://www.sidefx.com/docs/houdini/nodes/sop/name.html) 60. [https://forums.odforce.net/topic/14951-naming-conventions-and-guidelines-for-houdini-scenesnodes/](https://forums.odforce.net/topic/14951-naming-conventions-and-guidelines-for-houdini-scenesnodes/) 61. [https://www.youtube.com/watch?v=eaFwQwF7T5o](https://www.youtube.com/watch?v=eaFwQwF7T5o) 62. [https://www.youtube.com/watch?v=Sdg4yULLsiM](https://www.youtube.com/watch?v=Sdg4yULLsiM) 63. [https://www.sidefx.com/docs/houdini/hom/hou/parmNamingScheme.html](https://www.sidefx.com/docs/houdini/hom/hou/parmNamingScheme.html) 64. [https://www.youtube.com/watch?v=Y7qHlZDlfR0](https://www.youtube.com/watch?v=Y7qHlZDlfR0) 65. [https://caveacademy.com/wiki/general/published-file-naming-convention/assets-published-file-naming-convention/](https://caveacademy.com/wiki/general/published-file-naming-convention/assets-published-file-naming-convention/) 66. [https://www.sidefx.com/forum/post/421582/](https://www.sidefx.com/forum/post/421582/) 67. [https://www.youtube.com/watch?v=hDkpF-BkOTc](https://www.youtube.com/watch?v=hDkpF-BkOTc) 68. [https://www.youtube.com/shorts/fHJpUdl45ec](https://www.youtube.com/shorts/fHJpUdl45ec) 69. [https://www.tech-artists.org/t/houdini-global-variables/12609](https://www.tech-artists.org/t/houdini-global-variables/12609) # [[]]