Is there a way to disable MSAA for HdStorm?

Community Hydra
1

Hi,

I saw in taskController.cpp, there’s a variable to define MSAA sample count at https://github.com/PixarAnimationStudios/OpenUSD/blob/release/pxr/imaging/hdx/taskController.cpp#L94, but anyone know is there a way to disable MSAA completely for Storm Renderer?

Thanks,
Keli

2

I meant will change MSAA_SAMPLE_COUNT to 0 disable MSAA completely?
// XXX: WBN to expose this to the application.
static const uint32_t MSAA_SAMPLE_COUNT = 4;

3

Hi Keli,

The render buffer has a “multisampled” flag; if this is disabled, Storm won’t use MSAA. You can set this here, for example: https://github.com/PixarAnimationStudios/OpenUSD/blob/0b18ad3f840c24eb25e16b795a5b0821cf05126e/pxr/imaging/hdx/taskController.cpp#L1289 by setting multiSampled = false in the AOV descriptor.
Hope that helps!
Tom

4

Hi Tom,

Thanks, it works! BTW, for the sample count, any plan to expose it to application?

Keli

5

Down the road this seems like an excellent storm-centric addition to UsdRenderSettings. Given that it’s easy to configure per-application, we haven’t heard many requests to change it specifically in usdview.

6

Hi Tom,

Do we have any other similar storm-centric additions in UsdRenderSettings? If UsdRenderSettings can hold storm-centric addition in general, that sounds a great proposal.

Keli