JB · Location Block

Location is the half of a scene prompt that everyone forgets to build. You spend twenty minutes on the character and then write "city street" and hope. JB · Location Block is the fix: one node that generates a full scene - location, background/midground/foreground layers, time of day, weather, even an atmosphere-driving color palette - and outputs it as resolved JSON ready to merge into your character document via a JB · Stitcher.

It's the second "one-shot combo" block in the JB suite (Outfit Block being the first), and like its sibling it merges what used to be separate generator + combiner nodes into one. The location_lists/ data it draws from is the same folder the standalone SMP location generator used, and there are 245 location sets in the dropdown - from indoor/activities/axe_throwing_bar to indoor/archery_range, climbing gyms, karaoke rooms, and hundreds more, organized indoor/outdoor by activity. The Edit List modal edits the source files in place, next-run apply, no restart.

The structure you get

The generated location JSON is layered, which is the whole point of building it in a node rather than a flat sentence. The toggles control which layers exist:

• enable_background (on by default) - the setting: what the space is, its scale, its mood.
• enable_midground - the fill between setting and subject.
• enable_architecture_detail - structural specifics (materials, fixtures, signage).
• enable_props - the objects that make a place feel used.
• enable_foreground_element (on) - a near-camera element for depth.
• enable_time_of_day (on) and enable_weather (on) - lighting and atmosphere.

Each layer is authored as its own sub-block, so a regional prompt can target location.background or location.props independently via JB · Extractor. That granularity is what makes the block feel like more than a fancy randomizer - you're building a scene you can dissect.

The color section (num_colors, harmony_type, palette_style, vibrancy, contrast, warmth, and the optional color_tone warm/cool/neutral override) drives an atmosphere palette that the location text references - "golden-hour amber light" rather than generic "warm lighting."

Outputs and install

Outputs: location_json (structured, colors resolved), location_string (flat form), and palette_summary (what the atmosphere palette resolved to). Installation is the usual pack clone with no extra deps:

cd ComfyUI/custom_nodes
git clone https://github.com/ping1979ping/comfyui-FVMtools

Restart ComfyUI; it's under FVM Tools/JB.

The honest note

This node is a catalog generator, and like any catalog it's only as good as its entries. The 245 sets are heavily weighted toward indoor activity venues - if you want a generic forest or an empty desert, you may find yourself scrolling past a lot of bowling alleys and pottery studios first, or editing a set to fit. That's the Edit List modal's job, and it's the reason the node lets you into the source files at all. Also remember: a location block produces JSON for structured-prompt models - if your encoder only reads flat text, use location_string and skip the structure.