RVT caching to improve material cost - how?

Development Rendering
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I finally sorted out RVT blending between my terrain mesh and rock mesh. Terrain material turned really green, in the shader complexity preview mode, after converting it to RVT stuff. The rock however remained brown as it was.

RVT_Lit_01
RVT_Lit_011566×899 70.6 KB

RVT_Complex_01
RVT_Complex_011568×905 30.1 KB

RVT_Material_01
RVT_Material_011706×958 198 KB

What do I need to do to make rock turn as green as the terrain ? Simply piping it into RVT output doesn’t do anything. Piping it into RVT output, then sampling from RVT and piping it into material output makes material green in the complexity preview, but material gets some super blurry gray spots (areas) on it.

This article talks about RVT cache, but doesn’t go into details what exactly they did Use Runtime Virtual Textures to Improve Landscape Performance in Unreal Engine | by Arunoda Susiripala | GameDev4k | Medium

EDIT: I did this and I got rock mesh to have lower compexity shader view, but it doesn’t look right at all:

RVT_Lit_02
RVT_Lit_021564×901 65 KB

RVT_Complex_02
RVT_Complex_021563×897 40.9 KB

RVT_Material_02
RVT_Material_021704×982 228 KB

Is it even possible to achieve!? If so, how?

P.S. For that last test I have 3 RVT volumes and each of the RVT meshes (terrain, rock) references all 3 RVTs (terrain, height and rock).

Thanks!

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When you are using RVT Cache, it only affects the landscape. The rock mesh is only reading from it.
I did a video about this topic recently.

2 Likes
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I see. So in other words that’s the best I can do as far as getting rock mesh “greener”?

Yep, I saw the video and sadly there is no graph shown in it :frowning:

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There is a section on What is RVT ok that video. You can jump to that via YT chapters.