Viewer window refreshes too slowly

[WangSnowchen]

Version: Gaffer 1.2.10.2-Linux
Third-party tools: Arnold

Description

When I load a scene containing thousands of USD Assets into my file, I will expand all the USD:purpose:proxy in the Viewer window, which is too slow to refresh. But opening the same file in Maya and previewing the same low-model will be very fast. Is this a problem with openGL? Because I have to align the light with a specific object when making the light. In Maya, in the Arnold rendering window, you can click on the image to select the model. Will it be available in Gaffer later?

[johnhaddon]

It's hard to say what could be causing the slowness without an example asset and without knowing how the display settings in Maya might differ, but we do regularly view fairly large USD assets in the Gaffer OpenGL viewer. Is there any chance you're able to share a USD file that demonstrates the problem?

It might be worth switching the Viewer to use Arnold in raytraced mode to see how that performs - in this mode you can still click on the image to select the rendered locations.

[WangSnowchen]

Sorry, I can't share this scene file due to project reasons. But what can be described is that we have a lot of thatched huts and tents

[WangSnowchen]

Is there any way to speed up my preview of the model in the OpenGL window? I noticed that when all low-level models were expanded, the fps was only 1-3 every time.

I have attached a picture of a single thatched house and its approximate number in the scene. This is just an early exploration. The actual number of thatched houses is much higher than this.

https://www.bilibili.com/video/BV1a34y1A7PH

[johnhaddon]

The just-released Gaffer 1.3.4.0 adds some settings to the viewer to control what is drawn based on the USD purpose of each object. See #5470 and https://github.com/GafferHQ/gaffer/releases/tag/1.3.4.0. It's possible that this will help, if when expanding the low-res models some non-proxy objects have been included by accident.