Artemking4 found the root cause of the bone 0 problem in IMesh:DrawSkinned: in shaderapidx8.cpp, bone 0 is also loaded as the model matrix, so rendering breaks unless it is reset afterwards. Wrapping the call in cam.PushModelMatrix and the matching pop fixes it, and he asks for bone 0 to be exposed.

In #developer-talk, Xenthio explained that his Source 2-style renderer is a replacement for shaderapi plus his own lightmap baker. Baking takes about 40 seconds on a map's first load; after that the map opens instantly.

In #developer-talk, Nak showed 5 maps rendered at 187 FPS with his pocket map script, saying baking static meshes helps performance a lot. Later he said he'd combine his RTS base with the pocket map script.

In #lua-help, .kkrill wanted to draw a model on a transparent background in a render target. Phoenixf suggested render.SetWriteDepthToDestAlpha(false), and .kkrill confirmed that was it.

In #next-update, Zaurzo confirmed this change broke his RNDX-based UI on dev (see the Discord item about RNDX).

Astralcircle asked to store env_fog_controller params in the client savetable; render.GetFog* can be overwritten.

ArtyomChyornyj2035 reported crashes at an identical client.dll address. robotboy655 said it looks related to a particle system with a C_OP_WorldTraceConstraint constraint tracing against a ragdoll, which nobody could reproduce before; a reproduction is needed.

In #lua-help, full metal sergeant 228 asked whether there's a better way to do controllable textures, since he heard the default matproxy library is very slow, and noted LVS creates a material per entity. Artemking4 suggested instancing a material per usage from a base material and changing only what's needed. Asked by TankNut how slow matproxy must be for that to be the alternative, he said creating materials is "dirt cheap" because they are just containers for shader inputs.

Akabenko wrote on his request to add the 3D skybox to SSAO_DepthPass that a stencil is needed, because the game world is expected to always render on top of the 3D skybox.

Earu reported that a brush model with an $alphatest material leaks render state, so materials without $basetexture (vgui/white, surface.DrawRect, fonts) stop rendering. He provided a map for robotboy655; the issue was closed as completed the same day.

In #next-update, Earu asked why fading static props stop writing depth while they fade out. Artemking4 and Evgeny Akabenko explained that fading props are moved to the translucent pass, and translucent objects don't write depth. In the evening discussion, Rubat asked why transparent props would write depth at all, and said alpha testing is irrelevant for fadeouts. Earu said he would remove his issue. Evgeny Akabenko and Earu then discussed dithered fades combined with TAA.

In #developer-talk, Astralcircle's game ran out of memory around poster 10 while making a huge map overview. Rubat pointed out that poster can leave the tiles uncombined via its second argument. Astralcircle then made a 20k screenshot of gm_construct.

robotboy655 applied a fix on dev for the 2017 issue about bad UV tiling in surface.DrawTexturedRectUV, noting it may move to a separate function or argument if it breaks addons (commit 6a75b6).

Commit 6a75b6 on main makes surface.DrawTexturedRectUV ignore the "sub pixel adjustment" of UVs so its UV arguments work as expected; only the Lua binding is affected.

Commit 693484 on main fixes is3DSkybox not resetting when returning from hooks, ships a higher quality Eli Vance face texture from the S1 repo and removes some unused libraries from the menu state.

callumok2004 reported that returning a value in PostDrawSkyBox prevents the 3D skybox flag from being reset. Fixed on 12 October (commit 693484).

Akabenko asked to remove mat_viewportscale, which users apply as an "optimization" but which breaks render target writing. greyliterature suggested fixing it instead; Akabenko agreed that either is acceptable.

RealGlorp posted a radial fog implementation, built on the radial fog work in obsolete-source-engine, in the request to bring over TF2 changes.

Commit 185851 on main makes surface.DrawPoly throw an error when given fewer than 3 vertices, fixes ropes turning invisible in a specific multicore setup and restores sk_auto_reload_time.

robotboy655: "Made it throw an error when giving it less than 3 verts" (commit 185851).