Basic light function material looks very sus

[alexpanter]

Hi,

I just created a new material and set “Material Domain” to "Light Function.
There is a single node, a constant, which is direct output.

Yet still, the vertex shader has 246 instructions and I use 4 texture samplers. This seems very sus. How can a simple constant yield that much work?

[Version: 5.2.0-25360045+++UE5+Release-5.2]
[Platform: Windows 10 (22H2) [10.0.19045.3086] (x86_64)]

[Frenetic]

Looks…odd… Although I know from my experience that the counts/costs of a material seem to be listed higher in 5.x vs 4.2x.

FWIW, I work in 4.26 and tried what you did, here’s the results (for ref/posterity):