I am putting together a still image that will include objects ranging in size from a few millimetres to several kilometres. There will be a distant scene set out as a backdrop and some much smaller objects in the foreground. Here is a first attempt at the backdrop:
I am using Blender 2.79 and have been trying to use adaptive subdivision (especially on the sea) but it doesn’t always appear to work (sometimes renders black). I am wondering whether the sheer spatial range of the scene is causing problems with the numbers (rounding errors etc). Also I can imagine there might be similar inefficiencies relating to rendering things on this scale.
Of course there is no reason why I should not shrink the backdrop to the point where the difference in scales is less extreme but I have found there can be problems here where, say, foreground lighting can ‘bleed’ into the backdrop in a way that is unrealistic.
I would be grateful for any words of advice from people who have experience of working on similar projects.
Examples of other things I would like to understand:
How do you manage textures on objects that extend far into the distance (like sea or a plain) ?
Are there ways of breaking the scene down into layers in such a way that the lighting will appear seamless?
I adaptive subdivision reliable in 2.79 ?
I will move to Blender 2.8 eventually but right now I can’t afford to take the hit required to make the switch.
All insight and advice welcome.
David Wilson (omnivorist)