Write and read generated texture coordinate space with the alembic exporter and modifier #88081

New Issue

Simon Thommes · 2021-05-06T16:35:28+02:00

Simon Thommes commented

2021-05-06 16:35:28 +02:00

The issue that this addresses is using the Generated texture coordinates of a mesh in a shader on an object that is being cached.
Currently the read cache is not able to correlate the read mesh data with the original data and thus the generated texture space is recalculated in reference to every frame.

Illustrated here:
generated_space_caching-2021-05-06_16.33.25.mp4

Test files:
generated_texture_space_caching.zip

The proposed solution is to implement caching of the generated texture space data by adding it as an additional vector data layer in the alembic format on exporting and reading it back to the mesh data with the Mesh Sequence Cache modifier.

The issue that this addresses is using the `Generated` texture coordinates of a mesh in a shader on an object that is being cached. Currently the read cache is not able to correlate the read mesh data with the original data and thus the generated texture space is recalculated in reference to every frame. Illustrated here: [generated_space_caching-2021-05-06_16.33.25.mp4](https://archive.blender.org/developer/F10056558/generated_space_caching-2021-05-06_16.33.25.mp4) Test files: [generated_texture_space_caching.zip](https://archive.blender.org/developer/F10056513/generated_texture_space_caching.zip) The proposed solution is to implement caching of the generated texture space data by adding it as an additional vector data layer in the alembic format on exporting and reading it back to the mesh data with the `Mesh Sequence Cache` modifier.

Sybren A. Stüvel was assigned by Simon Thommes

2021-05-06 16:35:28 +02:00

Simon Thommes commented

2021-05-06 16:35:28 +02:00

Changed status from 'Needs Triage' to: 'Confirmed'

Simon Thommes commented

2021-05-06 16:35:28 +02:00

Added subscriber: @SimonThommes

Sybren A. Stüvel commented

2021-05-18 19:04:08 +02:00

Changed status from 'Confirmed' to: 'Resolved'

Sybren A. Stüvel closed this issue

2021-05-18 19:04:08 +02:00

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Write and read generated texture coordinate space with the alembic exporter and modifier #88081