Some Adobe Substance material files are very large and slow down the file. Is there a way to reduce their size?

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1

I’ve started using adobe substance materials in twinmotion (overall they’re great) but some .sbsar files are very large. 300mb is some cases. This dramatically increases the size of the Twinmotion file, slowing down it performance especially when opening and closing the file. Is there a standard practice to reducing these file sizes?

2

lowering the bitmap resolution should reduce file size ( but I will also have an impact on the bitmaps quality)
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