Ah, now we have a clue as to what's going on...the model size is 3 feet by 7 feet, i.e., huge. "Very high" resolution is still not high enough for a model that size.
When you're working with a file this size, you need to use one of the higher resolutions that are only available if you hold down the "shift" key while clicking on "create new file". Two higher resolutions will be available. You will want to select "maximum". You will get better results, to a point. That is a very large model and it stretches the available resolution in Aspire.
This link explains what's going on: http://support.vectric.com/images/FAQ_I ... tureV8.pdf
If there is any option to split the work into smaller pieces, each done at higher resolution, that can help to get better results as well.