I have two effects which work in C3 with the 2.5 runtime, but they do not work (bad render) using the C3 runtime. Is there documentation on what changes may be required for effects for the C3 runtime?
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IIRC effects should not need any changes to work with the C3 runtime. File an issue if something's not working.
Issue submitted:
https://github.com/Scirra/Construct-3-bugs/issues/2080