Landscape does not participate at baking light (GPU Lightmass)

[Art_yom_3d]

Hi,

My problem - looks like landscape does not participate at light baking. Its not landscape resolution problem or intensity of indirect light. Its not even lighting settings of project.

Because I tried bake light with static mesh as ground and light is baking as intended. But if i put landscape as ground it’s not baking.

Changing versions or creating new project not helping. Same in 5.4.4 and 5.6.1.

Everything was fine till one day. I can trace only one thing - I was testing disabling Mesh Distance field (because it was tanking my inport time). I even enable it back and still same problem.

Pleas help! It give me headache for two days…

[Art_yom_3d]

I notice one thing in 5.4.4 version. If I delete Landscape and Ctrl+Z it back, after this landscape start working with light baking as intended.

[SupportiveEntity]

Hey there @Art_yom_3d! That’s an interesting reaction! Does the landscape still work correctly after reloading the project?

[yujiang.wang]

This is a bug that has been fixed in the community fork of GPULM: Epic's GPUlightmass - #668 by yujiang.wang

Specifically, it is an execution dependency issue. GPULM landscape ray tracing dynamic vertex buffer creation should be delayed until RDG execution:

[SupportiveEntity]

Fantastic work as always @yujiang.wang! Thanks for the information!

[Art_yom_3d]

Thank you so much