"Why was v4 lost" - I deleted it because I was using civitai to test out different levels. the versions 1-5 were all just different training step counts of the same process.v6b had meaningful updates to the training approach and hit different. I didn't see a reason to keep so many versions - try v6.0 at a lower strength to see if it does the same thing. If you can tell me the file name you have for v4 and you still want it I will upload it again (I can't remember which file it was offhand)

https://civitai.red/models/2861440/div2k-photorealism Also, I uploaded this right after and I find it superior - you should give it a try, too, you might like it better.

@arain233 If you want to let me know the file name I will upload it back to the site. Sorry for the confusion - thanks for trying out my stuff!