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Why Plyvel

Plyvel does not replace your renderer. It checks what comes out of it and asks one question: did the design change?

Your rendererAny renderer that saves PNG or JPG (for example D5, Lumion, Enscape, V-Ray, Corona, Twinmotion or Blender) makes the approved render, and you edit one layer of it.
PlyvelLays the edit over the approved render, pixel for pixel, and measures what moved.
A named reviewerConfirms each group, writes what they saw and signs. The export carries the receipt.

Plyvel does not replace the renderer. It sits between the edit and the export.

After your renderer, not instead of it

Keep whatever produced the approved render, for example D5, Lumion, Enscape, V-Ray, Corona, Twinmotion or Blender: any renderer that saves PNG or JPG. Plyvel takes that render and the edited one (or a model, which it renders itself with Blender) and lays them over each other, pixel for pixel.

Your design stays as drawn: every result is compared with the approved original.
Each check shows its measured value and its threshold, or says plainly that it could not measure.
What cannot be measured is named and handed to a person, never scored.

A person signs, and it shows

A reviewed render leaves Plyvel only after a named reviewer has confirmed each review group and written what they compared. Before that, the only download is a draft whose file name says it is unreviewed. The export carries a signed receipt that binds the files, the measurements and the review together by hash.

That is the difference from a renderer’s output and from an AI image tool’s: not a prettier picture, but a picture with a record.

What you bring

You have	Give Plyvel	It measures
Two renders from any tool	The approved image and the edited one, PNG or JPG, the same size.	Camera, edges, clipping, spill, locked colours; the outline with masks.
A model	GLB or a packed .blend. Plyvel renders it with Blender at day and, if you ask, at dusk.	Dusk against day, under the dusk policy.
Nothing yet	The included example.	Camera, edges and clipping, and dusk darkness under the dusk policy, on a pavilion that is not a client project.

Plyvel does not open SketchUp, Revit, Archicad or Rhino files. Export a GLB, or render in your tool and bring the images.

What it will not claim

That the image is a photograph.
That the building is accurate, buildable or compliant.
That the reviewer is who they say they are.
That a threshold is calibrated when it is an engineering hypothesis.

The receipt prints the first and the last of these itself, and its disclosure says it does not certify the built work. The reviewer’s name is recorded as typed and never checked.