3D render in Paper Space jagged lines

[al_bey]

Hi all, hoping someone can assist.

 

I have an issue- when creating a 3D drawing in AutoCAD 2022, the shading on diagonal lines when in paper space appears jagged, see screen shot attached. This happens when printing to pdf/ plotting and when viewing on the screen.

 

I am using the BASE command to import the 3D Model into a template.

 

The shading looks fine in model space in all modes on diagonal lines.

 

Is anyone able to please assist?

 

Many thanks 

 

Alex

[f700es]

Try viewres and set it to 15000 and then maybe facetres and then dispsilh. Play with those settings a bit.

[al_bey]

Thanks will try that tomorrow 

[al_bey]

I tried playing around with all of those settings, but still have the same problem even after regen each time.

 

Any other ideas?

 

[al_bey]

Just as an update, this only seems to happen when using BASE command. If I plot to a new layout page using VIEWPORTS then the shading looks fine?

[johncabahog]

Try to increase the shaded view quality.

 

[Reetie Lubana]

On 1/23/2024 at 9:25 PM, al_bey said:

Hi all, hoping someone can assist.

 

I have an issue- when creating a 3D drawing in AutoCAD 2022, the shading on diagonal lines when in paper space appears jagged, see screen shot attached. This happens when printing to pdf/ plotting and when viewing on the screen.

 

I am using the BASE command to import the 3D Model into a template.

 

The shading looks fine in model space in all modes on diagonal lines.

 

Is anyone able to please assist?

 

Many thanks 

 

Alex

 

This is a fairly common Paper Space / viewport issue rather than a problem with your model.

What you’re seeing is facet aliasing caused by how AutoCAD displays and plots shaded viewports, especially when using the BASE command. Model Space looks fine because it’s using higher real-time display resolution; Paper Space viewports are rasterized differently.
 

Here are the things that usually fix it:
 

1. Increase viewport display resolution

AutoCAD uses a lower tessellation for shaded viewports by default.

In Model Space, type:

FACETRES

Set it to:

10
 

(Valid range is 0.01–10, higher = smoother curved/diagonal edges)
 

Then REGENALL.

 

2. Check VIEWRES

Still in Model Space:

 

VIEWRES

 

Answer Yes to fast zooms

Set it to something like:

2000

 

This affects how smooth diagonal edges appear when displayed.

 

3. Viewport Visual Style

In Paper Space, select the viewport and confirm:

 

Visual Style = Shaded or Shaded with Edges

Not Conceptual or Realistic (those can exaggerate faceting)

You can also try:
 

SHADEDGE
 

Set to:

3

(Smooth edges without heavy outlines)
 

4. Plot settings (very important)
 

When plotting to PDF:

Plotter: DWG To PDF.pc3

In Properties → Graphics:

Set Vector Resolution to 1200 dpi

Set Raster Image Quality to High
 

Make sure Plot transparency is ON (even if you’re not using transparency)

Low raster resolution is a major cause of jagged diagonal shading.
 

5. BASE command note

The BASE command creates a Paper Space representation that behaves like a shaded viewport. It’s more sensitive to resolution than raw Model Space views. Increasing FACETRES and plot resolution almost always fixes this.
 

6. Quick test

As a sanity check:

Create a normal viewport (not BASE)

Set it to the same view and visual style
 

Plot it

If the jagged edges disappear, the issue is 100% display/plot resolution related, not geometry.