Toposurfaces VS Toposolids in Revit Tutorial

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This Revit Tutorial will be a quick comparison between the Toposurfaces and Toposolids in Revit. With Revit 2024 we had a major change to Topography with the introduction of Toposolid.
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Timestamps

00:00 Introduction
02:25 Basic differences between Toposurface and Toposolid
04:10 Boundaries
05:27 Materials/Layers
06:43 Contour Lines
07:24 Splitting tool
08:10 Subdivisions
09:27 Building integration

96YT23

[quiksilver]

Damn, you must've read my mind. I've been over here struggling with Toposolids all weekend.

[devarshpatel]

not even kidding i was just looking for this for my submission tommorow

[bastiaanvinkestijn]

Very professional comparison. Compact overview, thank you! And as always Autodesk made toposolids a lot better in Revit 2025, looking forward to your next comparison ;-)

[benschebella]

Shaft/vertical openings also work for cutting toposolids

[TheFledge]

Thank you for this great and good understanding comparaison. I must to go to see your others video

[bakerfaisal]

Topologies are perfect in my opinion, I could do so so much with them in my projects that I couldn't do previously especially in terms of having earth in places above /below building that should not be cut, however though. Buildings pads were truly great, and I wish they bring them back into toposolids, so so many scenarios would be so much easier with simple building pads

[e.e.z.e.e]

Hi Milos. There IS a workaround for the (possibly annoying) 2 things about topsolids. Both workarounds entail using either ACAD or Civil3D...

1. "Split toposolids - can't be rejoined". Solution: Save a 3D view (only show ALL the split toposolids to re-join) into a DWG file. Clean up the "splitting polylines" in ACAD, SaveAs a new DWG as a new "surface". Create new toposolid from this modified DWG.

2. "Make a toposolid by face from mass - the toposolid can't be edited as a normal toposolid". Solution: Kind of the same thing. Save 3D view into a DWG file. Re-import into Revit, then create new toposolid from imported DWG.

[eastudio-K]

ive been creating in place families under the toposolid category, so to keep track and be able to find the cut later for adjustment

[Constantinesis]

From what I`v seen, toposolids are overall a step backward, especialy because the missing pads

[YVaio]

A problem that nobody mentions is the graphics. With toposurfaces you can see the profile lines on elevations and sections, which adds depth and shape to your site, whereas in toposolid there is no profile visualization option and it shows as a flat surface in technical drawings (except for plans with contours of course). The only workaround is supposedly enabling folding lines (+ambient light if you need to) as a guide and then drawing detail ones where the profile is right, but takes a lot of time + it's view specific... I don't understand why such a basic feature is not added. I know toposolids are based on floors which don't have profile lines (as they never needed to), but didn't they think to make this exception for toposolids?

Another issue in graphics is the flat shading. Well, that's more of a minor one, as most of the time you are going to use Revit for technical exports, but still remains an annoying feature sometimes when you need to show shading, and your site looks like plastic...

It's such a shame because, for me overall, toposolids are a step forward.

[tarikinfo]

thanks a lot
can you explain how to calculat fill and cut in toposolid

[DMSE]

Topo surace is a sheet and topo solid is justva floor with a different name

[ejbg]

the worst change added to revit they just overcomplicated for no reason

[trollenz]

Well, I was very enthusiastic from the feature at the beginning... After trying it, half the cuts I've tried failed and gave me errors, it's badly implemented and some methods don't make any sense at all... Let's say I have a basement with foundation walls, the floor cuts the toposolid but I still have to create a void to delete the remaining part of topography above the floor... Painful... I'm wondering who is the lunatic in charge of developing those kinda tools 🤦🏻

[jankralicek]

With toposolid we can't calculate the stuffed of the build. But with toposurfeces yes, we can.

[JRNL]

The material’s UV mapping are a serious issue with toposolids : instead of planar mapping vertically you get something which is mapping perpendicular to each triangle and the result is chaotic. Any solution to this?

[TrungNGUYEN-tecn]

anyone please give us a brief conclusion of when we should use either toposurface or topo solid

[fahmietajuddin]

hi balkan..your video is really helping me as a new beginner..can i request, can u draw a simple data centre building..tqvm

[eightteen]

topo solid dont work on cad link topo from civil 3D, the point is not align in the topo line of the cad file if you create from import compare on topo surface the point is accurate align on the cade line topo

[TRWcobraa]

Balkan please I need help.
I can't edit any of the extrusions I modelled... Its saying can't regenerate family casework 3. Edit family to modify it... I don't know what to do