When trying to print to wall size, say 12 feet by 7 feet, you want to have a final dpi of at least 128 dpi for a near mag view. 160 to 200 if you want a razor sharp image. Typically resizing an image in Photoshop beyond the original size at the highest and best resolution is usually 200 to 300%. That may sound like a lot but it isn’t. 

 

Normally when you want to resize to mural dimensions you use a third party app that can resize to such proportions. Such as Genuine Fractals or Imagener’s software. 

 

As an example; You create a render of 2400 x 3200 at 600 dpi using Vue. Then using Photoshop, you could safely resize to 200 dpi at a dimension of 7200 x 9600. That would translate into a size of about 48 inches wide by 36 inches tall, not exactly the overall size you are looking for. A third party app could additionally resize to about 300 to 400% more and thereby giving you the size you are looking for.  The higher the DPI and size you Render your image, the easier it is to resize latter, but will increase you Render times significantly.

 

Remember Dot Per Inch and you can do the math a little easier. All software has limitations when resizing resolutions and dimensions. You do not always get the results you expect because of those limitations.

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