Groom Warm-up Issue in Movie Render Queue

Groom在Movie Render Queue里的暖场问题

请问Groom动力学解算(Niagara系统),在参与Movie Render Queued时候,无法暖场,导致前几帧可以看到头发从T pose坠落,有办法解决吗?我的设置如下:

特效粒子都已经完全充实画面了,但Groom仍然会在第一帧才开始坠落,除非我提前几十帧渲染。

假设我的过场动画有100个镜头,我想渲染90号镜头,如果想确保第一帧是好的,那么必须从80镜头的中间开始渲染,这会覆盖80镜头的素材,这很头疼。

Groom Warm-up Issue in Movie Render Queue

Regarding Groom dynamics simulation (Niagara system) when using Movie Render Queue, it cannot warm up, causing the first few frames to show hair falling from T-pose. Is there any solution? My settings are as follows:

The effect particles have already fully filled the screen, but Groom still only starts falling from the first frame, unless I start rendering dozens of frames earlier.

Assuming my cinematic has 100 shots, if I want to render shot 90 and ensure the first frame is good, I must start rendering from the middle of shot 80, which will overwrite the footage of shot 80. This is very troublesome.

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[Image Removed]I found a key setting that can solve this issue and ensure normal effects within the regular rendering range. However, please confirm: for this ticket, the main feedback is whether the effect meets expectations when this setting is not checked?

Hello the general guidance is to ensure that your level sequence has some handles in it that go beyond your start frame. So all of anim tracks and camera cuts track would start earlier than your first frame but the amount of time you want to warmup. And then to enable Render Warmup Frames and Use Camera Cut for Warmup.

Hi, let me explain:

1. The test starts at frame 0, with no dynamic valid frames before it.

2. With the following settings, all objects will be prepared before formal rendering, except for Groom:

Render Warm Up Count 100

Engine Warm Up Count 100

3. If Render Warm Up Frames is checked, Groom will stabilize at the start of formal rendering.

My question is, when Render Warm Up Frames is not checked, Groom behaves inconsistently with other particles. Is this expected?

I see. Yes Groom needs the engine to properly tick forward to be able to update.

Thank you for your explanation. It seems that for Groom to render properly, it is necessary to actually render some frames through Render Warm Up Frames.