Sculpt - paint selection bug?

[thburn]

Hello,

I have created a sketch one part is a spline. I extruded the sketch to a solid.

Then I went to Sculpt mode, choosed Modify-->Convert moved the mouse over the face create by the spline.

Then I activated the 'Paint selection' tool and selected a few faces.

Then I used the 'Edit Form' tool to push these faces downwards a littlebit.

So far no problem. Then I activated the 'Paint selection' tool again and tried to select the pushed down faces again.
But this does not work for some reason. I can only select those faces which I did not push down.
Then I did the same but this time I pulled up the faces. And here the 'Paint selection' works. It seems this happens only if I push down the faces.

I made a screencast of it to make it clear:

I have one more thing to complain but this is minor.

If I switch from Model workspace to Sculpt workspace the solid body gets a bright grey color.

Then if I activate Modify-->Convert to select a face to convert to T-Spline the selected face does not really distinguish from the other faces it is also very bright grey.

You can see it in the screencast at around 01:22. One cannot really see which of the faces are selected and which are not.

Is there any setting to make the colors more different?

Thanks...

[TrippyLighting]

See this Idea in the Idea station. Vote for it if you agree. It'll also tell you what button you need to push to get teh desired behavior. 

[thburn]

Hi TrippleLighting,

I don't understand - what has your reply to do with my problem?

The weird paint selection behaviour has nothing to do with pressing SHIFT or CTRL.
I just drag the mouse over the pushed down faces and they don't get selected - but if I am on faces which are not pushed down they get selected just as presented in the screencast.

[Anonymous]

I think I have a solution for you.

What seems to be happening is the paint selection tool is not able to grab faces that have dropped into the solid space of the Box under. 

To fix this, 

Select dropdown menu > Selection Filters > (turn on) Select Through.

Hopefully this will fix your issue.

[TrippyLighting]

Yeah, sorry. That was total rubbish. I shall take away a goo dnumber of Kudos from myself and hand them to you 😉

"Select Through" in the selectiion filters should work.

[Phil.E]

Thanks for trying @TrippyLighting

But it would appear to be Select Through. Can you @thburn please confirm this?

Thanks,

[TrippyLighting]

Yep. I tried it and it, saw the same effect and select through shouhd work.

[thburn]

Hi,

thanks fro the replies, I can try this evening.
But 'Select through' is in my opinion to select faces which are on opposite sides of a body.

Why I have to activate this to select top faces which are just pushed down? They keep top faces or not?
Enabling 'Select though' will cause the problem that I select accidently faces on other sides of a body (if there are).

So 'Select through' is a temporary workaround but not the solution for this issue.
From 'Paint selection' I expect the faces I drag get selected. This is obviously not happening so for me it is still a bug which should be solved.

And what about the bright grey body (and also bright faces if hovering with the mouse) if switching from 'Model' to 'Sculpt' workspaces as I asked in my opening thread?

Thanks!

[TrippyLighting]

I'd have to agree that there seems to be a little inconsistency with the brush selection tool.

While they are top faces of the T-Spline, once you push them to intersect with the bottom of the ghosted body they become unselectable with the brush tool if brushed over.

You a select them, however, if you single-click on them (with "select through" off)

The ghosted body only serves as a visual reference when in the Sculpt environment. There is nothing you can do with it or select on it because it is not part of the Sculpt environment.

Thus, it should not interfer with the normal brush selection behavior.

The face you select for conversion into a T-Spline actually does highlight ever so faintly. If you change your environment from "dark sky" to "tranquility blue"  you'll see that it in fact does highlight. The Viewport themes in Fusion 360 would need some careful TLC to correct that issue.

[PhilProcarioJr]

@Phil.E

I agree with @thburn that does look like a bug, only a few of the faces passed through the other side and even the ones that didn't are not being selected. Plus if you have a surface activated like that it should select faces on that surface regardless. Just my opinion but that should be fixed.

[thburn]

Hi TrippyLighting,

> While they are top faces of the T-Spline, once you push them to intersect with the bottom of the ghosted body

There is not bottom at all, it is just the spline shaped top face of the solid which I selected for sculpting.
The single faces I paint over are not pushed as far that they intersect the body, they are just pushed down a littlebit and do not intersect with the body.

Just to make it clear...

[Phil.E]

This is not a bug. This is designed behavior. Whether it meets your expectations or not is the question, certainly you feel that it's a bug, but let me explain the  current behavior.

Select Through allows you to select through all objects. Not just picking T-Spline faces on the backside. It works for you in Model space and Sculpt space.

The ghost body of the Model space shape is selectable because T-Splines snap to Model objects.

So when you push the T-Spline beneath the surface of the ghost body you need Select Through in order to select the faces, but only for group selections. Try any of the other group selections, they all behave the same way, not just Paint.

However, I did find that individual selections apparently ignore Model faces, hence the seeming inconsistency and there being no need for Select Through when picking individual Sculpt faces. 

I will ask if we can improve Select Through to ignore Model bodies for group selections. This would be an improvement, not a bug fix, because the behavior today is strictly as designed.

You could also put this on Idea Station to gauge community support.

Thanks,

[Phil.E]

Ha, good catch. This is one of those rare cases where what you find is "as designed" as well as considered a "bug". 🙂

So it's now logged as a bug and I'll post any responses I get from development. For now, you will need to use select through, or just pick individual faces rather than group selecting.

[thburn]

Hi Phil,

believe it or not - it is not a problem of pushing the selected faces below the body, I created another screencast:

I pushed the selected faces down for around 5 milimeters. Then I rotated the body so you can see it is not below the ghost body...

F360 file is attached...

[PhilProcarioJr]

@thburn

I did the exact same thing you did after he said it wasn't a bug and found that it doesn't matter if the geometry goes below a surface it will not select the modified area. 

[Phil.E]

I don't think you guys are seeing how the Sculpt shapes are deforming. The entire zone that is not selectable is in fact under the surface.

Anyway, thanks for the feedback. And as I said, this is technically as-designed, but seen as a bug, which is rare but not unheard of. Therefore it will be addressed in our bug fixing process, it's been logged.

Thanks,

[Anonymous]

What I am seeing is the surface is being moved into the same space as the original body. Because it now occupies the same area, it is "submerged" into the ghosted body.
The ghosted body still exists but is not part of the currently available selections.
But it is creating interference with the selection in spite of it being ghosted.
If there is a bug here then it's that the ghosted body seems like it should not have influence over a selectable surface.

The easy fix is select through. Select through (if I understand it correctly) simply removes the limitations that usually are in place for normal convenience of selecting the most probable elements.

Either way a solution to the issue is available.

[Phil.E]

Correct.

You said it. This is what we are trying to figure out:

"If there is a bug here then it's that the ghosted body seems like it should not have influence over a selectable surface."

You can use ghost bodies for object snapping, so that is going to stay. There is a setting in preferences to remove ghost body display, which would defeat the purpose of this workflow. But you can see that single selections of faces do not require select through. Select Through is intended to help group selections!

It may well be that Sculpt group selections cannot distinguish between ghost bodies and T-Spline bodies, and thus Select Through is always going to be needed. That is the question being raised here.

Thanks,

[thburn]

Hi Phil,

thanks - now I understand what you mean. The pushed down faces are pushed into the ghost body so they are below the ghost bodies top face - right?

I tried with 'Select through' and I can select now the pushed down faces, but there is another problem, see here:

Now I converted also the bottom face of the solid. If I activate 'Select through' I can select my top faces now but the faces on the bottom get selected as well which I don't want and have to remove in an extra step.
If this issue is addressed in the bug fixing process hopefully they correct this as well.

Thanks guys!

[Phil.E]

I'm not sure what you mean.

This will never change. Using Select Through is intended to select the T-Spline faces that are "behind" other faces. This is as designed and not a bug at all. It's quite usefull.

If you are going to work using converted Model bodies, and want to convert opposing faces, here is your workaround.

Steps:

1. Create your Model space body

2. Start a Sculpt session

3. Convert the faces you wish to convert.

4. End Sculpt

5. Turn off visibility of Model body from step 1.

6. Edit the Sculpt node

7. Turn off Select Through and use Paint selection (or any other group selection) without any problems.

Alternate workflow:

1. Create your Model space body

2. Start a Sculpt session

3. Convert the faces you wish to convert.

4. Pick Sculpt faces one at a time.

5. Do your remaining Sculpt  modeling workflow.

Thanks,