Does Blender Cycles have this limitation? Because I have 63 unique textures inside one emission material and up to 62 textures render fine, plug 1 more - and it all turns into pitch black, both in viewport and final. No crash or slow performance, just blackness.
Textures are assigned to particles on per index base. Same setup in BI doesn't suffer from this thing.
PC specs are: Ryzen7 1700, GTX 1050Ti, 16 GB RAM, Win10