Can't sculpt on a plane in ortho looking directly at it but it will sculpt when I

Support Modeling
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am not looking directly at it. I swear this is a problem with 2.79b because I’ve never experienced this before and I know I’ve done this before.

The mesh is subdivided and a plane with no modifications. I can move my own everywhere and nothing sculpt, unless I tilt the view enough.

Also the geometry that is created when I tilt the view, if I go back to looking straight at the plane, I can sculpt wherever my pen touches where I created geometry from the tilted view.

My scale is 1 1 1, rot and loc are both 0. I only have a multires on it. There is no reason this should be happening and I’m sure this didn’t happen before 2.79b.

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screen.png1920×1004 195 KB

Works as expected here

“It doesn’t work” is not enough information to troubleshoot why it doesn’t work for you. Also a photo taken with a phone/camera is not a screenshot, and a screenshot is not a substitute for an example .blend.

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It’s plenty of information. Add plane, go into ortho 7 to top down, subdivide (dyntopo, multires, and applied subdivision all have the same effect), go to draw brush in sculpt mode and it exhibits the behavior outlined above. We aren’t talking a need for a blend file here.

Front faces on and off makes no difference, feather makes no difference, all mirroring and tiling is off, there is no setting that fixes this behavior and I swear it wasn’t happening before 2.79b.

Changing clipping distance doesn’t make a difference either and I don’t see the importance in uploading a blend file that is a default plane subdivided and sculpted on.

Btw, this is simple subdiv not catmull as I want it square.

I don’t have anyway to upload the blend anyways, but if you know a way I’ll do it.

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wontworkunlessviewischanged.blend (2.06 MB)

Here’s the file. Sorry, I’ve wasted all day trying to figure out what’s wrong and it’s really got me stressed.I don’t know if it’s from a add-on I have or why something simple like sculpting on a flat plane should be giving me issues.

If I use 2 to tilt down it’ll sculpt, or if I manipulate the view downwards with my pen it’ll sculpt. But looking straight at it, it won’t. But when I do change the view and sculpt, if I go back to looking straight at it, it’ll only add geometry if it is going to touch my previous strokes.

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Here’s even weirder, I tilted and it steadily sculpted back and forth going upwards and look at the gap areas where it didn’t sculpt.

This entire area is one stroke but it seems to regularly leave gaps even when the pen is down.

Attachments

2018-04-21 22.36.30.jpg2300×1725 296 KB

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upload.png1920×1004 159 KB

I’m able to replicate the issue with the file. Opening it with UI I can’t sculpt until I change the clipping end from 2km to 655m or below.

Opening the file with my own defaults I can sculpt on it.

The units are set to metric and the unit scale has been changed. The object size in the viewport is much bigger, 200m or 200 BU wide.

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I see, yes lowering it stops that. Could you please help me understand why this is happening?

If it’s ortho, shouldn’t the distance not really matter? Also, why did that cause saturation patterns in the photo?

Thanks for helping me out.

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wontworkunlessviewischanged2.png1920×1004 175 KB

I was still looking at it. The change in units and unit scale also adjusts the clipping values. Switching to default units it reveals that clipping values are 0.1 and 200 000. Default clipping values are 0.1 and 1000.

Don’t know the technical details but being in ortho doesn’t free up from Z buffer boundaries. It has come up in another occasion. If there are differences in the resolution accuracy compared to perspective, or how it affects sculpting specifically, that I don’t know.

Edit:
If sculpting uses z buffer for getting the depth information, it would make sense, but that’s just my speculation