High raster effect resolution in large document makes effect dissapear

Hello
I'm making some graphics to be printed on a car. I have some lines with outer glow on them, but Illustrator won't render these unless I use 72DPI in raster effects reslution. I would like to go higher, but it won't give me anything. Guessing it's to heavy for Illustrator maybe? Is there anything I can do about this? I'm making my graphics in 1:1 scale, but I do it in a lower scale since it's just vector art anyway, however how would that effect my glow? Since it's a raster effect.

but I asked the printer and he said 300DPI
Which just goes to show how widely misunderstood overstated rules-of-thumb are in this industry. In estimating appropriate PPI, you want small enough pixels (at print size) to avoid visible pixelation. In other words, you don't want to be able to see the squareness of the pixels. That's a function of the tone screening method resolution. As long as the pixel size is not larger than the screening method size, the screening method is not going to be fine enough to be able to render the squareness of a pixel as a square.
Suppose you've got a pixel that measures 1/75th inch. How many round dots will be required to at least roughly render that square as a square? At least four dots. In other words, you'd have to be printing with a halftone screen of at least 150 LPI for pixelation to be visible. And even at that, the assumption would be a pixel that is perfectly aligned with a halftone cell, and on only one color sep angled at 0°. Stochastic screening is even more forgiving of lower raster resolution, because all the screen dots are the same size anyway. They are randomly patterned and their frequency is altered to suggest different tones.
So vehicle graphics are not going to be printed at anything near a halftone screen resolution of 300 LPI. (Don't be confused by claims of "high resolution" of composite printers like 1440 or 2880 DPI. Those figures are talking about printer spot size, not tone cell size.)
Add to all that the fact that concern over image sharpness doesn't even enter the picture when talking about raster effects that are intenionally fuzzy anyway (shadows, glows, etc., etc.).
Flattening "stitching" artifacts need to be watched for if the soft, fuzzy raster effects overlay text or other vector objects that need to be crisp. But that's usually a matter of correct stacking order (or Illustrator bugs).
75 PPI for raster effects on vehicle graphics is a gracious plenty; probably less. You don't really think billboard photos are sampled at 300 PPI @100%, do you?
JET

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null

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null

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High raster effect resolution in large document makes effect dissapear

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