BD Draw Rect

A "draw a rectangle" node sounds like the least interesting thing in the pack, but BD Draw Rect earns its keep in two ways. First, it draws a flat-color rectangle with rounded corners and feathered edges - useful for compositing, UI masks, or just stamping a clean color region. Second - and this is the part people miss - the shape source isn't just geometry. Give it any ComfyUI mask and it will use that as the shape instead, feather it, and write it into a specific channel of a packed RGBA image. It's a color-compositor and a channel-packer in one box.

How it picks its shape

Three sources, in priority order:

1. mask input - any MASK you wire wins; geometry is skipped entirely.
2. mask_from_packed - extract one R/G/B/A channel from a packed_image and use that as the shape (handy when a packed RGBA already holds a useful mask in one channel).
3. geometry - the rectangle from x_center / y_center (normalized 0–1) and rect_width / rect_height (fractions of the canvas, can exceed 1.0), with corner_radius (pixels, clamped to half the shortest side) for rounded corners.

feather applies to whichever source is active: positive expands outward (interior stays fully opaque), negative bleeds inward, 0 is a hard edge. fill_r/g/b pick the color, opacity blends it over the base image (default 1.0 = fully opaque).

Outputs: image (the fill composited onto the base image, or onto a blank canvas_width × canvas_height canvas if no image is wired), mask (the feathered shape itself), and packed_out - the packed_image with your mask written into pack_channel (R/G/B overwrite, or A appended if the image has no alpha).

Installing

It ships in ComfyUI-BrainDead:

cd ComfyUI/custom_nodes
git clone https://github.com/BizaNator/ComfyUI-BrainDead
cd ComfyUI-BrainDead
pip install -r requirements.txt

or ComfyUI Manager → search "BrainDead" → install, then restart. No models, no extra deps.

Where people get burned

Almost nowhere - this is a small, well-scoped node - but two things trip people: forgetting that a wired mask beats your carefully-set geometry values (disconnect it to use the rect), and expecting feather to soften a shape in place when it actually expands outward by default. If the soft edge is eating into the area you wanted, flip the sign.