BC7 is ideal because it has much better quality than BC3 while keeping the same filesize, which is what I would do, though older versions of CSP (Not sure how old) do not support BC7. So if you care about catering to people on ancient versions of CSP then you could go with BC3, or even uncompressed (R8G8B8A8, or R8G8B8 for no alpha)
On an unrelated note, I reduced the poly count of the Scamdream Mclaren. The headlight LEDs are not perfectly round anymore because of it but aside from that I haven't noticed any model quality differences. I mean, I did take 1.6 million polys out of the model, what more do you want from me 😂 It also has a cockpit_LR now, (just a crappy one generated with CM) which it did not before, so that's also something. If I had more time and motivation I would learn physics editing and try to make it drive a bit nicer but that's not in the cards for me, would love if somebody else took a shot at it though. Might try to reduce it some more, since 700k is kind of heavy, but it's still lighter than the Lanzo and Callahan so, I consider it a good place to start. I would have liked to switch the tire mesh with something with a UV that can use one of the tire textures from the big three so it can have tire fx at least, but I have no clue where I would yoink those from.
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