How can I optimize the renderer for Terragen Classic

Started by alucadmo, June 01, 2012, 02:23:28 am

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How can I optimize the rendering for Terragen classic? There aren't a lot of options to tweak. I have a 12 core mac pro, but what I've read Terragen can't take advantage of multiple cores.

I also have 32 gb of ram, how much should I use for the Memory consumption / Maximum buffer size.


There's honestly not much you can do. Terragen Classic only uses a single core and is 32 bit so it can't take advantage of more than a very maximum of 4GB of RAM. The ideal scenario for current hardware is a CPU that does clock speed increases when fewer cores are in use, so that the single Terragen Classic thread is at least getting the fastest possible CPU clock for its single render thread. Most of Intel's modern CPUs do that, I assume it's supported under OS X but not certain.

- Oshyan



Do you really have to use TG Classic? TG2 is really much better. TG Classic really has a lot of limitations especially on the Mac:

- It's not Intel native so it's running under Rosetta and not reaching its potential full speed (TG2 is Universal, so Intel native)
- It can only use one core (TG2 can use all your cores)
- It's limited to a maximum of 4 GB of RAM, although I'm not sure there's much you could do except render huge images where that was likely to be a problem (TG2 is 64 bit)

I don't think there's much you can do to optimise renders. You can probably set the buffer size quite large without problems, set it to 128 MB or something. I'm not sure if it will make much difference. It's really the only "optimising" setting you can change.

If you find TG2 harder to use, and really it isn't as easy to get to grips with as Classic, it might help to know that there are a lot similarities between the two. You can actually make scenes in TG2 in a similar manner to how you'd do it in Classic. I think the key is to ignore the Network view, you don't have to use it. Surface mapping is really very similar, a lot of concepts from Classic carry over to TG2. It's just as easy to add clouds for example.

I have been working on-and-off on a transition guide for Classic users to move to TG2. Would this be useful to you?




Thanks I really appreciate your insight, I think I may move on to Terragen 2.


I'm only using a crappy laptop, so TG2 (while I have it installed) is just too slow.

However, the biggest things that impact on render time are:

1. 3d clouds
2. water
3. rendering at over 1280x960

Keeping a render small and with none/little of these features means you might have to wait only an hour, rather than six.