Section fill by layer/Tags

This seems like an ultra-simple request that would be immensely useful – Is it possible to specify a section fill by layer just as we can now do with line styles? I am trying to illustrate masonry veneer and concrete foundation walls in plan view and becoming frustrated with the amount of work it takes to perform what should be a simple task. I’d be happy to just select different color tones without hatch patterns for now…

Currently in order to differentiate a material in a floor plan (or section) view I have to create a 2D section slice and add a raster material to the geometry, requiring a lot of work coordinating when a change is made. With the extra work I am able get a great looking plan with shadows etc generated from the model, still composed from two to three stacked scenes in Layout:

Or, in an effort to avoid the continuous coordination of section slices, I am having to stack multiple scenes each with different section fill styles to get a plan view like this in Layout. The scene below is composed by stacking five different scenes (concrete hatch | masonry hatch | wall poche | base plan section with floors/roofs/structure and a 2D furniture/fixture scene):

This method has its own set of problems, particularly the hatch scenes have to be rendered in vector/hybrid to be transparent in the stack, which will draw all edges beyond regardless if the style has them turned off in SU. I end up spending an excessive amount of time tweaking geometry so that the scenes stack properly in Layout.

If section fill were to be specified by layer, it would greatly reduce the number of scenes needed and make the section tool more powerful in general.

I have used the Scalp plugin with some success however it’s too cumbersome for large building models and still relies on generating a 2D section slice to generate multiple hatches.

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I see you’ve used SKALP, a good extension I’ve used in the past. I’ve also tried Curic Section and am using that as it seems to be a little lighter on resources (I have to admit there is one thing I miss from SKALP though). Curic has some useful extensions, maybe also take a look at their Scene Manager, I think you might find that it’ll change the way you manage your modeling.

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Thanks for the recommendations, I have looked into Curic plugins but I find there is a lack of info available that explain how these plugins work and how to adapt them to my standards. I am not about to purchase another plugin that requires adapting to preset configurations and scripts.

I use curic section. It’s really good, but not perfect.
I think it would be extremely useful if it was possible for the “Section fill” to be linked to the Layers (or tags, haha)
It could have 2 options for “color by layer”: one for the 3D model state (like it already is), and other only for the section fill. So we can manage the model more precisely.
Like this:

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This is precisely what I dream about while sleeping. Please Team Sketchup, make this happen!

I feel your pain.

My workaround method is to model the walls, but delete the top face (the “top plate”) leaving the wall hollow. I turn OFF section fills, and use a pattern on the base of the wall. Windows and doors are 2d symbols. Most of the time, instead of using sections
To make this work even easier, I dont even use section planes for Plans - I just model each level of the building as a group (Ground floor, first floor, second floor, etc) and use scenes to turn on and off the groups so the First Floor Plan just looks top town at the first floor.
This can even work for combination walls (where the bottom half of the wall is a different material to the top half)

I’ve uploaded a simple file to demonstrate.

Untitled.skp (170.7 KB)

It doesnt solve the problem for cross sections; I just use a section fill for those, or trace a face in LayOUt and add the mateiral there, if necessary (and done after all design work is complete so no further changes).

It really would be lovely to have an option where Hatches/Patterns could be visible when using Hidden Line, Wireframe and LO Vector Rendering modes, even though they are raster. (even better would be vector-based hatches, but I assume that’s just too difficult to implement, for some reason).