Post-Upscale Procgen Blend (1080p)

This is where the SIGNAL LOST look finally lands on the finished video. OTR_PostUpscaleProcgenBlend takes the upscaled, composited episode and overlays the procedural CRT render on top - the scanlines, the flicker, the green wireframe, the title - so the whole episode reads as one continuous retro broadcast instead of an upscaled video with a green mess awkwardly on top. It's an ffmpeg blend, not a model: no GPU, no download, pure math.

Two required inputs: source_mp4_path (the SilentComposite output, 1920×1080 HuMo + LTX composite) and procgen_mp4_path (the OTR_SignalLostVideo procedural render, natively 1920×1080). Audio passes through with -c:a copy - the frozen master is never touched here.

The dials that do the work

• blend_mode - default screen, and that default is the whole aesthetic. The canonical "bright-additive overlay": procgen colors at full intensity, upscale still visible underneath. Sixteen modes total (lighten, addition, overlay, hardlight, multiply, darken…), but you'll live in screen.
• blend_opacity - 1.0 is full strength (the shipped look). Drop to 0.5 for a moderate sheen.
• shadow_crush_threshold (18) - a subtle but crucial fix: any procgen RGB channel below 18 is forced to 0 before the blend, so the near-black noise floor of the CRT render (which can be blue-tinted, like (5,5,10)) doesn't lift your source darks toward a pink/green cast. Set 0 to see the un-crushed symptom and A/B it.
• green_only_overlay (true) - zeros the procgen R and B channels so only the green wireframe contributes. This one exists because blending in YUV color space turns a sparse green wireframe into color-shifting garbage; the filter pins both inputs to planar RGB, does the per-channel math, and goes back to yuv420p. Pair it with screen or addition - with lighten, a fully-saturated magenta source plus green wireframe collapses to white.
• bypass (false) - copies source to output verbatim, no blend. That's your A/B tool, and your "clean uplift for an external editor" escape hatch.

The showier option: scopes_mp4_path (the scopes_only.mp4 from OTR_SceneAwareScopes) turns this into a 3-input blend - procgen screened on, then the scene-aware scopes lightened on top. And audio_bars (default bottom) is an always-on green frequency strip along the bottom of every frame, driven by the master audio, lightened at 60%, seated below the caption safe-area. Off = byte-identical to the pre-overlay video.

Output and gotchas

Outputs: final_mp4_path (named <source_stem><out_suffix>.mp4, suffix _procgen_blended by default, in the source's directory) and report. Install is pack-level; needs ffmpeg. The gotcha is mode pairing: green_only_overlay is tuned for screen/addition, so if you flip blend modes you're on your own. And if the blend looks muddy, check shadow_crush_threshold before blaming the procgen render - a hard, true-black floor is what keeps bright blends from washing out.