Digital Art Community Forum for Artists & Creators

Username: OqUoqsZPAZ0W
Post Date: 2024-01-04 10:56:28

Hi, I have this big project, wich is a digital artwork projected on a 4x7meter wall, Rebelle don't seems to be able to handle 4x7m artwork so I tried to work smaller but I'm not sure of one thing : _ Should I work on less px canvas like 8000x14000 with 300dpi ? _ Should I work on more px canvas 160000x280000 with 150 dpi ? What is the best or is it the same thing ?

Username: 2dpainter
Post Date: 2024-01-04 12:21:43

Well, I'm not doing the calculation but such large print do not need 300 dpi and also not 150 dpi. As a wild guess, I would say 75 dpi and less. Why, because you look at such a big print rather from a certain distance.

Username: 2dpainter
Post Date: 2024-01-04 17:54:20

Here are a few dpi recommendations at an appropriate viewing distance Viewing distance / dpi 1m / 3.3 ft 180 dpi 1.5m / 5 ft 120 dpi 2m / 6.5 ft 90 dpi 3m / 10 ft 60 dpi 5m / 16 ft 35 dpi

Username: dreamkeeper
Post Date: 2024-01-04 23:13:37

[USER=188460]@OqUoqsZPAZ0W[/USER] As 2dpainter said, such a high resoluton isn't needed. At 72 dpi 4x7 meters is 11339x19843 px. You mentioned "projected": does that mean actually using a projector? If so, the 72 dpi version would equate to ca. 225 Megapixel - which AFAIK no projector would be capable of. Also, if you have Rebelle Pro, you can safely work at even lower resolution and upscale using NanoPixel export. Assuming 4x upscaling, that would bring your working resolution down to about 2857x5000 px - which is a comfortable size to work with.

Username: salulum
Post Date: 2024-01-04 23:19:03

And if it's 'projected' like with a video-projector, you need to know the projector native-resolution, those are the pixels numbers you can use for the canvas-size in rebelle. (but if your picture is to be zoomed in during the projection, it's not the same story).

Username: PainterJames
Post Date: 2024-01-11 03:23:05

The texture (how the painting material behaves over each type of canvas or paper) that nanopixel generates on export (I'm using Rebelle 7 Pro) is very realistic, beautiful, and faithful to one's art (should look great if the projection requires a zoom at some point). I have seen great results working on print projects with a small canvas like an A3 (I like it *super snappy* when painting, so I prefer not to go much bigger than that with Rebelle... but sometimes making canvases of 4500 or 5000 in one side, though), then using nano to export upscaling to 4X or so. What they recommended here about DPI is also spot on. 300 dpi is mostly for reading book distance (but also depends on the paper, many newspapers print at way lower res due to the rough paper not being good for more). About the distance, for example, posters are often not 300 dpi images, they're usually quite lower resolution. I would even make some test before the presentation or exhibit, with a borrowed projector, painting a relatively small (in pixels canvas) and using a crazy multiplier in nano pixel export (not necessarilly painting with nano ON (activating it just immediately before exporting)...as OFF might be more snappy). In your shoes I'd grab a projector similar to the one to be finally used (same resolution and ratio at least), and look how it looks like with a nano export of a high multiplier, 4X. Of course ideally using the canvas size (or a proportional size that ends up at that size exported with nano) of the native projector resolution, as suggested (even if that'd require some graphic tweak). I don't know if it's for a gallery or a class or conference/event. But even to watch it globally the viewer will need a distance. I guess you should be fine with a canvas of a bigger size of 5000 pixels as max, 72 dpi and using nano on export.