Well, I thought about that (or similar) method a while ago , even wanted to post it in feature requests but you were faster :) .The method itself would not be too bad to have as a feature for sure, but it itself can be quite cumbersome as it is for example it is in Maxwell render. I personally would prefer to have the ability to render only on network machines without the main one yet directly from max - and to be able to work using all my main pc resources for modeling etc. at the same time as render goes on network pc's and see the updating vfb placed on second monitor - well or something like that :)
for that :
"After 10 years using bitmaps on network drive with vray, I understood that it much more faster to use local drive with synchronization program in background. Just because long transforming vertex process. You wait some minutes for transforming vertex, and after 10 sec stop render to change something. So never use network drive for bitmaps if you need a speed workflow. ;) "
I would not agree (or not fully agree to be more precise) , if your network speed is 1gb or above - there will be no totally intolerable delays even on quite texture/geometry heavy scenes , at least in my case there are no too frustrating ones. I would suggest using the method I use - no network drives at all or at least no network drives in a way as most people use them. The method is quite simple and the most easy for me to manage :
Main pc :
drive C: - windows and all other non networked apps photoshops etc.
drive D: - maps, models, 3ds max itself - it could even could be softlinked to a folder on a more speedy ssd drive C: - it is in my case at least
drive E: - projects and all stuff related to them from drawings and photos to project specific x-refs, proxies or some maps
Network pc's :
drive C: - windows, apps and 3dsmax
drive D: - none physical, but disk d: from main pc connected and mapped as a D:
drive E: - none physical, but disk e: from main pc connected and mapped as a E:
Well may be that' the exact "network drive" usage method you are frustrated about but as I'm not, I decided to specify that I'm talking about. This is my default method for at least 10 years or so too :) and it had newer let me down especially after upgrading my network to 1gb/s a few years back. Of course your D drive should be fast or even be some kind of RAID configuration but even using some quite old 2tb wd black (my case) it works perfectly on scenes such as some city aerial/closeup still renders with something like 5gb in textures with and tons of x-refs and proxies . Your method is of course faster but in my case too cumbersome to manage , not to tell how many 2tb drives I would need :) There are one definite benefit in using your method (beside some speed improvements) - constant and many backups. :)
hope that helps in some way :)
for that :
"My point was not to have 3d Max on every computer. Here we really need to buy soft, and this is much more expensive then hardware. And if I need to have 3d Max only for Corona, in my mind I need to add 3500$ to Corona price."
Hmm as far as I remember, vraySpawner can run even on unactivated 3ds max'es or even expired trials without any problems - in vray 1.5 that worked for sure , here
http://forums.autodesk.com/t5/Installation-Licensing/3ds-Max-amp-render-farm/td-p/2835195 people say that you can legally use 9,999 :) PC's as render nodes with a single 3ds max license only for the main one (that need thorough checking) and vray 2.0 too have at least 10 free rendernodes as written here
http://www.chaosgroup.com/en/2/vray.html , but I should probably say it had cause in v3 they changed their pricing policy most notably regarding render nodes , yet the greedier they get yet more people will lean towards Corona :) and I truly hope it will have some decent number of free render nodes (at least 5) when it will be sold and there will be no need to pirate it . :)
Hope that helps too :)