Crashes when on launch when i have Optifine installed using CyclopsCore-1.9.4-0.9.0 and OptiFine_1.10.2_HD_U_D4, CyclopsCore-1.9.4-0.8.2 didn't crash with it and can't downgrade to it because i am playing Skyfactory 3 on server.

I can't do anything without a crash report.
Your best bet is to report this on the Optifine issue tracker, my focus is on supporting regular Forge-based environments, Optifine always does some funky stuff.

crash-2017-01-09_05.06.52-client.txt

I know it says "Do not report to Forge! Remove FoamFixAPI (or replace with FoamFixAPI-Lawful) and try again. (foamfix-0.5.0-anarchy.jar)" but i tried removing it and it still crashes.

ps: I have tried to find the optifine issue tracker but their site shows no sign of it.

It seem I have the same issue.

Modpack: FTBPresentsSkyFactory3-3.0.4-1.10.2 (BETA)
which contains CyclopsCore-1.9.4-0.9.0
OptiFine_1.10.2_HD_U_D4 added.

No issue when Optifine is not loaded.

Crash Log:
http://pastebin.com/v65DUnAj

Looks like one of the core mods is incorectly patching the TextureAtlasSprite class.
There is a warning about FoamFixAPI, it may be the problem.
To isolate the problematic mod the crash has to be reproduced with only one core mod installed.

FoamFixAPI, is not the problem you get the same crash report without it.

@rubensworks
i had the same issue
i testet only CyclopsCore with Optifine and it works fine... i will try the other core mods from SF3 now...

hmpf it was the last coremod i tried... Surge
with only surge and optifine as mods it also crashes...

disable Surge and SF3 loads...

@toaran Could you report that to the Surge issue tracker and link to that issue from here?
Thanks for testing this.

someone else already had the same issue

Epoxide-Software/Surge#9

@rubensworks just had to go and make this complicated couldnt take the blame I have firmly ruled out all mods that errored during the crash... which makes this issue all the more complicated. That said @rubensworks is off the hook as the person that has an issue to fix. As for why your mod gave off the exception on the crash I do not know, if you could shine some light on that. That would be great. :\ the modpack in question is still FTBPresentsSkyFactory3-3.0.4-1.10.2 (BETA)

@Johnvista64 The reason why I think it crashes when loading CyclopsCore is because CyclopsCore appears to be the first mod loading the TextureAtlasSprite class, which has apparently been corrupted by the combination of Surge and Optifine.

yeah this crash is definitely caused by cyclopes core and I hope a fix comes soon cause I love using optifine

@Johnvista64 It's likely to be one of the coremods you're using. Try adding only CyclopsCore and Optifine to an environment and let me know if it still crashes.