Previously, the Navmesh was always generated from scratch on scene load, this could be slow especially on larger maps.
We added the ability to bake the navmesh to disk. Scenes with baked navmesh data will load significantly faster.

Memory Optimizations

We drastically reduced navmesh memory usage by packing & compressing the cached navmesh data. This means much larger scenes can now generate successfully.
For example, a very large map (~4km x 4km) now generates fine, before it would just run out of memory and crash.

Polymesh Generation Optimizations

Navmesh generation has two steps: heightfield generation, then polymesh generation.
We optimized the second step, polymesh generation, which directly translates into faster navmesh loads from baked data.

Fixes

Using RenderDoc captures to check timings is painful. Source 2 has an awesome backend to measure GPU timings with Timestamp Manager, but it was buried deep in the engine.

I integrated it to work with our stuff and our command lists API design.

Can very simply just toggle it from the game.

Now you can see what's killing your performance at a glance, makes it much easier to actually tackle the problem.

We've cleaned up our VR code internally again, and fixed a bunch of things in the process:

We'll still be iterating on our VR feature set heavily over time, which should be a lot easier with a cleaner codebase for this stuff.

Slowly iterating on Indirect Light Volumes to start to feel awesome, still a long way to go to deal with all edge cases but I have a clear roadmap.

Probes are generated starting from your eyes' view and do two passes for more accurate bounces and quicker iteration.

Editor UX with them is overall better specially across sessions.

TheRedPixel ( https://x.com/theredpix ) kindly contributed with a PR reviewing some things and I iterated on it, helps to better adjust backfacing probes without needing manual adjustment.

New cool foliage stuff was using clip(); and discard; directly instead of adjusting for Alpha to Coverage, this makes MSAA cry.

All sorted now, has A2C and doesn't turn translucent at distance.

Orthographic View didn't support our fancy glass properly, now it does.

We now support Vertex Snapping in the mapping tools, Enabling it allows you to snap you selection to a Vertex.

Also you can now snap any of your selection to the grid.

We fixed a crash that occurred when joining multiple games in succession.

Source 2 only supported up to 64 resource types, joining multiple games exceeded that limit and caused a crash. 
We've removed the limit, so you're now much more likely to play more than two games in succession without crashing.

We have Lasso selection in the mapping tools, allowing for more precise selections.

Box select also got some more love, allowing you to add and remove selection, as well support the select through geometry option.

Quad Overdraw debug vis broke at some point when we dealt with changes on stencil buffers, that was an oversight, fixed now.