I think with space designer you have to make sure all the parameters are reset. I haven't delved deep, but it is not as simple as altiverb so easier to NOT get the results you want. Altiverb is excellent and I have done a couple of IR's that sounded fine on SD, but had to adjust many parameters first.
hopefully I can find a simple way to make totally neutral reverbs on it (maybe by reading the manual first!
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