[Soc-2018-dev] Weekly Report #3 - Further Development for Cycles' Volume Rendering

[Brecht Van Lommel]

Great to see a first working version!

For threshold, there exists a mesh->volume_isovalue that should be reused.
In the UI it's in the Smoke panel for the domain, as Empty Space Clipping.

I would expect some performance impact from using tiles, it's more
expensive to do a tiled lookup. Depending on how big the impact is we can
think of some optimizations later.




On Fri, Jun 1, 2018 at 6:17 PM, Geraldine Chua <chua.gsk at gmail.com> wrote:

> Wiki link: https://wiki.blender.org/index.php/User:Geraldine/GSoC_
> 2018/Reports#Week_3
>
> While progress is slower than I'd like, I have added a working
> implementation of the tiling algorithm and some examples here (
> https://developer.blender.org/T55264) (there are actually 2 very obvious
> typos in *render/image.cpp* that I accidentally committed, will fix them
> in the next commit).
>
> As in the task comments, memory usage savings depend on the threshold,
> though even with the lowest possible threshold value, the sample image's
> memory usage was already reduced by ~33%. Later on it may be possible to
> make this value user changeable.
>
> *To-do next week*
>
> * Modify sparse tiles to support generic types (currently only supports
> float4, should be fine as long they have a > operator overloaded).
>
> * Add support for all Volume attributes (currently only supports color).
>
> * Change detection method for calling sparse grid creation (currently, a
> new ImageDataType was created, but will probably change this to a bool
> member of Image).
>
> * Make this compatible with the Mesh Volume speedup (
> https://developer.blender.org/D3038). Because of they are currently
> mutually exclusive, using this implemntation will actually slow down
> rendering.
>
> * Implement lookup for tricubic interpolation (currently just throws an
> assert if a compressed texture tries to call it).
>
> * Add support for CUDA and OpenCL (this may actually not be tested soon
> since I won't have access to a PC with a compatible GPU for another couple
> of weeks).
>
> All of these should be completed by the end of week 4.
>
> *Potential to-dos*
>
> * Create a wrapper class for device_memory's of SparseTiles.
>
> * Support 2D tiling.
>
> * Make threshold value a user-inputted value.
>
> * Remove the SparseTile struct altogether and just treat tiles abstractly.
>
>
> --
> Soc-2018-dev mailing list
> Soc-2018-dev at blender.org
> https://lists.blender.org/mailman/listinfo/soc-2018-dev
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.blender.org/pipermail/soc-2018-dev/attachments/20180602/3d747d17/attachment.html>