* Forward custom primitive data info to material baking
* Added Custom Primitive Data case to material baking engine test
* Also updated broken Material Baking tests screenshots as subtle differences are now occuring on shadows... Disabled shadows from the map light source to minimize noise in future test results
#rb JeanFrancois.Dube
#virtualized
[CL 32499424 by sebastien lussier in 5.4 branch]
* Required a source mesh with two sections with identical materials
* Occured only when created a merged mesh without baking down textures
#jira UE-201699
#rb Patrick.Enfedaque
[CL 30245768 by sebastien lussier in ue5-main branch]
*Added FPrimitiveSceneDesc, a structure you can initialize with a description of the primitive you're trying to Add/Remove/Update in the FScene
-Added entry points in FSceneInterface to do those operations, legacy entry points using UPrimitiveComponent are untouched.
-The code that executes those operations in FScene has been refactored to be shared between the two entry points as much as possible to lessen the additional maintenance burden.
*Added FPrimitiveSceneProxyDesc/FStaticMeshSceneProxyDesc/FInstancedStaticMeshSceneProxyDesc, structures that hold all the necessary information to create a FPrimitiveSceneProxy/FStaticMeshSceneProxy/FInstancedStaticMeshSceneProxy without depending on AActors or UPrimitiveComponent.
-Those structures can be initialized by constructing them with the corresponding UPrimitiveComponents, or by constructing their default versions and initializing the desired fields.
-Creation code for FPrimitiveSceneProxy/FStaticMeshSceneProxy/FInstancedStaticMeshSceneProxy now takes all its info from those desc structures. They are created on demand during scene proxy creation for UPrimitiveComponents. This means no additional memory, and all serialized assets & blueprints are unaffected.
*Added IPrimitiveComponent/IStaticMeshComponent interfaces
-These allow for some editor-only interactions occurring during proxy creation, and serve as a common interface for some code that expected to manipulate UPrimitiveComponent/UStaticMeshComponents. For example FObjectCacheEventSink / FObjectCacheContext now uses those interfaces to associate the resources between various users and interactions like proxy recreation on shader/mesh changes occur through those interfaces.
* Misc
-Moved scene primitive related member variables into a new structure (FPrimitiveSceneInfoData) to facilitate code sharing and implementations of various related functionality (like SetLastRenderTime).
-Changed ObjectCacheContext to store associations between resources and components using component interfaces so that other systems creating proxies have the proper behaviors when resource changes require proxy recreation.
-Added natvis support so that component interfaces to UPrimitiveComponent/UStaticMeshComponent display the component ptr for easier debugging.
-Changed FMotionVectorSimulation to use UObject* instead of UPrimitiveComponent*, it was already using this internally
-Templatized some nanite helpers like ShouldCreateNaniteProxy & AuditMaterials since we need to use them from both UPrimitiveComponent & FPrimitiveSceneProxyDesc and it'll help make sure we keep them in sync.
#jira UE-191990
#rb Zach.Bethel, Ola.Olsson, Jason.Nadro, Krzysztof.Narkowicz
[CL 27200716 by dominic couture in ue5-main branch]
* Added a FBoxSphereBounds::Builder class to help avoid these kind of issues
#rb jeanfrancois.dube, patrick.enfedaque
[FYI] Graham.Wihlidal
#preflight 6419e677ec01de1664d3e95c
[CL 24739078 by sebastien lussier in ue5-main branch]
* Use FMatrix as the conversion to FTransform can't handle non uniform scaling
#rb patrick.enfedaque
#preflight 63f7bb45dd78dd50f60568bb
#tests built HLOD for Asteria, no more floating pieces (a few neon signs were using ISMCs with non-uniform scaling)
[CL 24397797 by sebastien lussier in ue5-main branch]
FHierarchicalLODUtilities::BuildStaticMeshForLODActor() - When adding impostors, should use the component transform rather than the actor transform
PR #8624: HLOD imposters take component instead of actor transform (Contributed by ToniSeifert)
#rb patrick.enfedaque
[CL 24393186 by ToniSeifert in ue5-main branch]
* In this case, instead of baking each mesh material property to it's own buffer, we can write all the meshes to the same buffer as their UVs are already the final ones that do not overlap
* Memory usage is greatly reduced (in test case with ~300 materials to bake, peak is reduced by 5.5GB)
* A lot faster to process (~2x in most cases) as we are doing a single RT readback per baked material property
* We can also skip the final merge of the baked outputs, as we have a single one
Refactored the material baking module to have both code paths (single output and multi outputs) share as much code as possible
#rb jeanfrancois.dube
#preflight 63eba6e0284e76cdadbecb48
[CL 24226039 by sebastien lussier in ue5-main branch]
* Moved material creation in MergeComponentsToStaticMesh() to a standalone utility function
* Deprecate bCreateMergedMaterial
#rb trivial
[CL 24197343 by sebastien lussier in ue5-main branch]
We new merge the collisions of all the instances in the ISM component, instead of a single collision instance using just the component transform.
Also exposing a utility function for getting the collision information of a list of components.
#rb Richard.TalbotWatkin
#jira UE-174128
#preflight 63c99511c503023ab929831e
[CL 23814991 by benoit deschenes in ue5-main branch]
Merging static mesh actors resulted in static mesh sockets getting lost
* Added a "Merge Mesh Sockets" option to the Mesh Merge Settings
#rb jeanfrancois.dube
#preflight 63c0b1e602024f93d8d2f6af
[CL 23672695 by Sebastien Lussier in ue5-main branch]
