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Scene Scale for Archviz

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burnin:
Just a pro-tip for pleasant interoperability I learned along the way:

To prevent any unit, orientation & color issues make yourself an intermittent 'I/O scene' (kind of a 'triage') set to your own standard.

James Vella:
Display scale makes no difference at all. You can change this at any point to m, cm, mm etc wont do anything strange to the scene. I was refering to changing the system units. I also use CM for system units, I agree with danio1011 most things just seem to be easier overall for small scenes and aerials without the z-fighting.

Also I should clarify more what I mean about 'realworld' or 'tileable'. If you have any materials that use X/Y coordinates these will change between scenes.

Example mm scene:


Merging the mm scene into cm scene:


Modifier issue:
Chamfer modifier with 0.025cm ends up being 0.25cm

Tom:

--- Quote from: burnin on 2024-07-25, 15:57:16 ---To prevent any unit, orientation & color issues make yourself an intermittent 'I/O scene' (kind of a 'triage') set to your own standard.

--- End quote ---

That looks interesting but I don't get 100% what you mean. Can you explain a bit?

dzintas:
General rule of thumb for system scale I think is, if distance from 0.0.0 is:
0m-10m - millimeters, for modeling furniture or other knick knacks.
10m-100m - centimeters, single family house with a reasonable plot of land.
100m-1km - meters, apartment complex and so on.

In general there are no perfect unit scale for every situation, and it should be chosen by project size. I usually just bounce around from centimeters to meters depending on the project.
So if you mostly work on big projects, switching to centimeters will introduce other issues. Mostly viewport problems like zfighting, spastic camera, precision issues when moving objects.
For typing in small values just use centimeter display units. As for tyflow you can work on a smaller scene that uses centimeter system scale, with few interactable objects from main scene. Then cache the animation or export to vray proxy file, for use in big scene.
But of course this is only if you work on big scenes, if your main work are interiors. Your whole team should have been using centimeters all along.

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