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Imported FBX uassets file size are 2 times larger in 4.20 than in 4.19


Models imported into UE 4.20 from an FBX files have file size almost 2 times bigger than they do in UE 4.19 and UE 4.20 takes more time importing the models. I checked all the import settings, they match. And tried different import settings in 4.20. Nothing affected the file size of uassets. Also checked Engine Preferences. They are the same as in 4.19.

Where else can I look to solve this issue?

Thank you.

Product Version: UE 4.20
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asked Sep 13 '18 at 06:37 AM in Using UE4

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avatar image Kednerpo Jan 05 '19 at 01:18 AM

This problem got even bigger in 4.21.1

Original FBX file is 22,472 KB

Imported into 4.20.3 it was around 50,000 KB

Importing the original into 4.21.1 it becomes 206,772 KB

Almost 10 times the size! Ouch.

avatar image Kednerpo Jan 05 '19 at 01:40 AM

I just checked the same file in 4.19.2 and it is being imported at 39,466 KB

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1 answer: sort voted first

I can't help you, why this happens, maybe someone can. But: if it is exactly two times bigger, just halfe the import scale? To check the size you could overlap it with a box brush in editor and try to match it. When you import a window appears. And there:

alt text

importfbx.png (23.6 kB)
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answered Sep 13 '18 at 11:52 AM

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avatar image Torawind Sep 13 '18 at 12:29 PM

Thanks for the reply, I appreciate it. But my problem is that the file size of uassets in megabytes, the space occupied by them on my hard drive, is almost 2 times bigger in UE 4.20. So i have to use 4.19 to import my models and then migrate them to my 4.20 project. FBX model that I import in 4.19 is 9MB as uasset but in 4.20 the same model (same file) with the same settings is 18MB as uasset.

Would be great if someone can check this and confirm if this is the engine problem or on my side.

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