I’ve put around 20 scene captures in the scene, and it seems that ue5 is taking about x3 as long to render those (0.22 vs 0.75 ms). What could cause this?
Lumen is off, gi off, bloom off, motion blur off, nanite off.
edit: It seems that the captures happen nice and timely one after another in ue4, compared to ue5 where there are some sizeable delays.
You’re already well on your way to answering that! You’re checking the GPU profiler and seeing the scene captures in there and how long they’re taking. Now you just need to go deeper, expand each Scene Capture line in there and see what precisely it’s spending time on.
Here is a side by side 4.27 vs 5.3. I can’t really tell what the cause would be here that 5.3 is taking about x3 as much to do the same thing. I’ve ordered them by duration, and at least the ones on top such as BasePass and PrePass DDM are each taking about x3 as long on 5.3. 5.3 seems to be having some extra tasks, but they appear to be taking negligible time in the big picture. I’ve also noticed that summing up the individual bits does not always add up to the total time, for example in 5.3 the “Scene” is taking 0.61ms, but when expanding “Scene” and adding the individual bits up I end up with 0.5ms.
