I am trying to find a way to decrease the file size of a Twinmotion presentation. It is curently 8GB. So far I have established that the amount of scenes does not impact on file size, the resolution of scenes does not impact on file size, using resource collector (purge) does not impact on file size. The documentation does not seem to cover this. If you have an idea on what could be tried, let me know. Forum entries suggest TM files are quite often that big, but I wonder if the presentation can be made smaller. What causes these file sizes?
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I just created an empty presentation: 6GB.
An empty presentation should not weight that much. I think you may have some remaining unused materials in your scene.
Have a look at this guide:
https://dev.epicgames.com/community/learning/knowledge-base/rMyK/optimizing-your-twinmotion-scenes