Thanks, I did check my task manager and sure enough the memory consumption was increasing over time. I tried running the original sample code I found for trying out the effect and the memory consumption did not increase over time. So, not sure if it was this or not but it does seem clear my code has a memory leak somewhere. After experimenting with this a while again I noticed suddenly that the file called 'WDFME.exe' showed up in taskmgr with 100% CPU usage and the memory usage for that process was growing rapidly. I was unsure what to do so I terminated the process. After searching for this on google I discovered that corresponds to a My Passport disk I purchased recently to auto-backup all my files for me as they are written out. (I wonder if there may
be some kind of problem with it and the 3DGS engine? I don't know just guessing. ) The reason I say this is because I've had the My Passport drive for 2 or 3 weeks, but I'm only just now seeing this issue and have only recently started doing things with 3DGS. I've experienced this blue screen issue 3 times so far but this last time after terminating the WDFME.exe process its been over an hour and I still haven't seen it crash again. I found a link on google about the WD Smartware needing a Microsoft Update patch (KB 982524) which I don't have installed right now... so not sure if that is my problem here or not. Anyway, I'll continue investigating. Thanks for your help...