How does Modeling Resolution in Job Setup affect 3D model quality, and when should I use Standard, High, or Highest?

The Modeling Resolution setting (called Job Resolution in some places) controls how many calculation points (pixels) are used to represent the 3D composite model. It is set in the Job Setup form and affects modeling quality and computer performance. It is easy to get wrong, and getting it wrong quietly degrades model quality. It does not control the toolpath surface finish directly.

What Resolution Actually Controls

The 3D model is a height map, a grid of Z-value points spread across the job area. Resolution decides how densely those points are packed. A higher resolution means more points, finer detail captured in the model, and more memory and processing power required. The better the resolution quality chosen, the slower the computer will perform.

The resolution is applied across your whole work area. That is why job size matters as much as the setting: it is important to make the job just big enough to contain the part you plan to carve. Setting the material to the size of your machine bed (for example 96 x 48 inches) when the part is only 12 x 12 inches would make the resolution in the 12 x 12 inch area very low.

Worked example: if your machine is 48 x 96 inches but your part is 6 x 12 inches, and you create a 48 x 96 inch job, the resolution is spread over 4,608 square inches while your 72 square inch part gets proportionally very few points. The 3D model looks blocky or coarse, even at Highest. Size the job to the part instead.

What Resolution Applies To

Modeling Resolution applies to the 3D model (components and the composite model). It does not change 2D vectors. For 3D work it affects how much detail components keep, including imported models and clipart, and components made from a bitmap.

The Three Resolution Settings

Standard (fastest)

• Acceptable for the majority of parts.
• Fastest modeling calculation and lowest memory use.
• Suitable for decorative signs, medium reliefs and most clipart assemblies.

High (3 x slower)

• Consider it when the part is relatively large (over 18 inches) but still has small details.
• Example: a 24 inch decorative panel with intricate leaf veining or fine text.

Highest (7 x slower)

• Consider it for very large parts (over 48 inches) with small details.
• Expect slow modeling, slow previews and possible memory strain on older computers.
• Not needed for most CNC sign work.

These are general guidelines. The detail in the part matters too. A part with one large item in it (a fish) is fine at Standard, while a part with many detailed items (a school of fish) is better at High or Highest.

The Core Rule

Resolution is spread across the whole job area. A bigger job at the same setting gives fewer points per inch and a coarser model. If your detail is large and bold, Standard is usually fine at any size. If your detail is fine (thin text, hair, feathers, portrait features), you need a higher setting as the job gets bigger, or you need to shrink the job to fit the part.

Resolution vs Toolpath Quality

Resolution affects model quality, meaning how accurately the 3D shape is represented. The smoothness of the cut surface also depends on the finishing toolpath, in particular its stepover. A finely resolved model run with a very coarse stepover can still leave a rough surface, and a smaller stepover on fine detail gives a better finish. Set the resolution for the job size and detail, and choose the stepover separately.

Modeling Resolution vs Preview Simulation Quality

• Modeling Resolution (Job Setup): sets the detail of the 3D model itself.
• Preview Simulation Quality (Toolpaths menu): controls the number of points in the toolpath preview simulation, so it affects how much detail the preview displays. The higher the quality, the slower the simulation.

A high preview quality on a low-resolution model gives a detailed preview of a model that is still low resolution.

Changing Resolution Later

You can change the job settings later with Edit > Job Size and Position. Changing the job size or resolution on an existing model can change how much detail it holds, and large models can take a while to recalculate, so it is best to set both correctly at the start. If you move a model you built on a small job onto a much larger sheet by enlarging the job, the same pixels are spread over more area, so check the result.

Performance Tips

• If your computer is slow or has limited memory, start with Standard and only increase it if you see visible pixelation or lost detail in the 3D preview.
• Baking completed component groups can free system resources on complex projects.

Common Mistakes

• Setting Highest on a small job "just to be safe". It wastes resources with no visible benefit.
• Assuming resolution controls how smooth the cut surface is. That is mostly the finishing toolpath stepover.
• Modeling on a job the size of the machine bed, then wondering why the edges look jagged.
• Forgetting to revisit the resolution if you scale a job up to a much larger size.