Altering the lighting can produce dramatically different results.With iPads fast becoming a dominant medium for portable digital art, it’s no surprise that an entire ecosystem similar to PCs and Macs has sprung up. The red and green spheres enable you to bend and rotate joints – sometimes a little unnaturally.A drag of the finger rotates your view, and pinch or punch gestures zoom in and out. Fire it up and you’re presented with either a male or female anatomical figure, depending on which version of the app you’ve bought. Like the best apps, ArtPose is elegant in its simplicity. Like Poser, your model can be contorted into some very unusual, unnatural positions, but thankfully ArtPose includes a few predefined poses (for example, running or skydiving) that you can alter further to achieve the perfect stance. Preset hand poses remove the fiddliness of bending individual knuckles and fingers.You can then use the camera icon to take a JPG snap and then import it to your art program of choice so you can sketch around it, or use it as reference. This article originally appeared in ImagineFX magazine issue 115. The latter is particularly easy-to-use, with spheres appearing above joints and swipes of the screen adjusting the angle and rotation of limbs. Instead of Photoshop and Painter we’ve got Procreate and ArtRage, and instead of Poser – the software for manipulating a virtual mannequin – we’ve got Shawn Ogle’s ArtPose (at a wallet-friendly £1.99). Overall, though, this is a useful and well-priced app and a must-have for iPad artists. It’s a shame you can’t export figures as transparent PNG images so that they can be imported as a layer in Sketchbook without the slightly annoying backdrop.