just wanted to share my solution for baking the bump channel of a 3d Darktree shader. I found it quite a struggle, and was very near of doing it with Cinema, where the baker supports all kind of channels very easily, but I finally solved it :) I didn't find it here at cgtalk nor in the Internet, so maybe some newby like I am will find it usefull. So here it is...
First download [B]Splt_DT[\B] at Darksim.com and don't forget to download [B]Python[\B] either as the shader splitter is a Python script. Choose a 3d shader and the script will split all the channels into different files. Unfortunately LW won't be able to open any other channel than color and percent, so the next step is to open the newly created channels (bump...) and to convert them to percent (just RMB on the the root and choose [B]convert subtree to percent[\B] and do a save as. Now you will be able to load the channel as color. Choose procedural texture as layer type and as procedural type choose SimbiontLWTexture. Load up your newly created DT percent channel.
Now it's also important to change the texture color into 255/255/255 or else your bitmap will become tinted.
Ok, that's it, the baking procedure should be no problem, there are lots of good tuts for this. Oh and using AA is a real time killer, so I prefer to bake high without AA and scale down later.
Hey, this was my first contribution :) it' nice being able to give a little back, I've learned so much in such a short time here.