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Votes
0
Found in
2017.4.0f1
2018.3.0a1
2018.3.10f1
2019.1.0a1
2019.2.0a1
Issue ID
1143376
Regression
No
AssetBundles created on different machines have small rounding differences and are not equal by CRC
How to reproduce:
1. Open the user's attached project ("assetbundletest_crc.rar")
2. Build the AssetBundles
3. Repeat steps 1-2 on a different machine
4. Compare the differences between "scenes.manifest" files from different machines after running WebExtract, binary2text
Expected results: There are no differences
Actual results: The files have small rounding differences, which results in different CRC values
Reproducible with: 2017.4.25f1, 2018.3.13f1, 2019.1.2f1, 2019.2.0a11
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Resolution Note:
The reflection probe is created on the GPU. Different vendors are allowed to produce different rasterized results, so creating the same reflection probe on different systems with different GPUs/drivers can result in slightly different reflection probes. If binary compatibility is required, a dedicated build PC must be utilized to create the asset. The ambient probe is derived from the sky reflection probe, so slight differences in the reflection probe will cause slight differences in data derived from it. This is not a bug, just the reality of GPU rasterization today.