Iray render results!
Was previously using a rendering engine known as 3Delight and both of them have pros and cons. Iray, however, models light in a more realistic way and it actually allowed me to gain extra details on the two Alien models I had been using. It's probably complicated for those who are not familiar with this stuff, but basically, there is a way to instruct it to turn 'painted on' textures into modelled surface detail.
These are all experimental renders (two different Aliens, one Predator). All used the same lighting. Iray is a very new and different technique and essentially affords more photo-realism, but disallows control over stuff like shadows (including whether they even exist). Still debating whether or not to use Iray, because it requires a lot more time-consuming effort to modify every single surface on stuff like props, clothing, vehicles and environments. On the other hand, it does allow any individual surface to be turned into a beautifully realistic light source, which is hugely advantageous.
So, compare these with, say, the cybernetic character concepts, for an estimation of the differences between them.
Spoiler
Swidhelm's free Alien model (the one used in Alex Popov's '
Redemption' fan-film) - the eye sockets are visible, but it's a translucent cowl:
http://sentinalysis.deviantart.com/art/Iray-Alien-Example-Swidhelm-557050513The more recent Alien model, which I had posted some other examples of (seems to be more reflective, but that could be modified) - tail's properly skeletal now:
http://sentinalysis.deviantart.com/art/Iray-Alien-Example-Fo-Render-557052160The new Predator character model (might change the glossy reflectivity on the mask with that):
http://sentinalysis.deviantart.com/art/Iray-Predator-Example-Fo-Render-557052627Some of these look a little grainier than expected, but that could be altered for the next experimental tests, using the render settings.