VDB question - working in one project but not another, blurry rendering

Development Rendering
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1

Hi

Rendering Example

I’m hoping someone might have seen a similar issue and know what setting I’m missing. The first clip is a VDB I imported into a fresh Unreal 5.61.1 project and it works great. The second is bringing the VDB into an existing Unreal 5.6.1 project and I’m getting this really low res feeling, almost like the volume doesn’t have enough resolution.

I’ve used the same VDB import settings and same render settings but get this strange difference. The scenes are using path tracing, in Lit mode it works fine.

I have to use the existing projects as the scenes are all set up (about 30 animated scenes) so bringing them into new projects would be a nightmare.

Thankyou for any clarity on this!

2

Hello there @soedwards11!

That’s quite a peculiar scenario, if your render settings are all the same across both projects, then the blur/compressed effect is generated by something already present in your main project.

From the top of my head, the first thing to check would be scalability settings, make sure that your main project does not have anything enabled for saving resources, as the fresh project had no limiters at all.

The next step would be to check the values for post-processing in both projects, stuff like PathTracing and VolumetricCloud. If there’s a difference here as well, that will definitely affect your explosion effect.