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Scene Scale for Archviz

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Otuama:
Hi all,

We've always worked in meters but are considering thinking about considering switching to cm for a number of reasons.

One of my reasons being I find working with simulation plugins much easier in cm scale.

Can anyone think of any issues with doing this, considering we work with large scene for archviz?

Thanks

James Vella:
If you use real-world measurements for tileable textures then yes they will be out of scale when you merge them.

Also your modifiers that use scene units will also be out of scale.

Many things will go bonkers, but easiest way to check is create a scene in cm, merge things in and check. Some things will be fine, others wont. Check which matters most to your workflow.

If its only for simulations then why not just work in cm for those scenes and then bake them down or import them into your scene at the correct scale (in your case, meters)?

Otuama:
Hi, yeah we need to test whether switching things up will screw up our pipeline.

We don't tend to have 'use real-world texture coordinates' on in preferences as sometimes have issues with that.

Any modifiers we use that depend on scene units (shell & chamfer for example) I think we may find it better in cm because we need to enter very small values usually.

I can't really think of any modifiers we use where we'd have an issue.

When it comes to simulations, I find Phoenix ok in meter scale but have a lot of issues with tyFlow, especially when following tutorials.

90% of tyFlow tutorials I've seen are in cm.  I've had to set my precision to 5 decimals in order to fine tune stuff.

I've scaled things simmed in cm up to meters before and although it works fine it's not ideal.

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I think the obvious outcome from me bringing it up is to test the sodding thing in an actual job.  :D

Aram Avetisyan:
Hi,

if you mean system scale, I have used cm it, by gut feeling, and it has been fine. Not to say that other units have been problematic, absolutely not. If you know how and when to use system units, anything is fine. I think I have found other software using CM by default more than any other units (but still they worked fine with others and conversions). So if there is any I would suggest - go with cm.

If you mean the display units - then it is mm in most of the cases. This is because all architectural drawings/documents (except US I guess) have measurements specified in mm, and you just read the numbers and input, without thinking about decimals.

danio1011:
I'm from the US so I use ft and\or inches for display units.  But I recently switched from 'inches' to 'cm' in system scale and I've found PhoenixFD to be way easier to handle.  Even though it has a parameter for scene scale I never really found it to be global (affecting foam size etc).  When using CM everything just looks much more natural out of the box.

Just my personal experience but I'm very happy being on CM in system units now.  I don't regularly use TyFlow FWIW.

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