It's rather funny, actually. The DTIPB sprites were being used in a game that was supposed to release at the same time as DTIPB. Naturally, I quickly shifted away from those sprites, changed the whole script to make Anton's Vacation, and used the sprites being shown here. For the record, Anton's Vacation EP:2 is the last time you will see me use them, despite the fact I have the full set of all of Blue Forest's sprites. I've had new sprites commissioned solely for the fact that I DO NOT want my work associated with other works that use the same resources.papillon wrote: The real problem is if the reference pool is too small and people keep re-using the same stuff. Blue Forest may make the largest collection of sprites for sale on DLsite, but they've already been used in multiple well-known EVN productions, making them no longer a good choice. There's another set of sprite art you can find which was popularised by DTIPB; probably not a good idea to use them in any other game now because people will think you took them from there even if you didn't. There are several other sprite sets for sale that haven't, as far as I know, been used in ANY english games. Those are a better option to go for if you need art fast.
What you don't want is for your game to be mistaken for someone else's, or for your art to drastically contrast with your theme/tone. It's better to use such things sparingly or in the background. (Also, if your game focuses too heavily on off-the-shelf art, then someone else can legimately come along and make something that looks very similar and confuse people.)
Now we start moving into the backgrounds. When I started, I was the only one using those particular backgrounds. It worked really nice. Some of them are STILL going to be used in AV and upcoming Rising Angels and Pet Project. However, now that they are becoming more and more popular and used, I have to move away from them again and spend more money on BG artists. I'm stuck between a rock and a hard place. I have 25 sets. I had them all planned out for upcoming works. Do I risk moving forward and potentially tainting games that I've sunk a lot of money into the CGs and sprites, not to mentioned the MONTHS of writing I've sacrificed? Do I throw the whole set away and waste even more time and money getting unique backgrounds? My budget for free games is not infinite, but I'm not going to blow everything I've done out of the water because I didn't go for the alternative route.
In short, if you want to and have no alternative method, go for it. Just realize like I painfully did that you aren't the only rider with that pony in the show.