FPS rapidly decreasing in certain situations
I use a 16x PBR self-made texture pack that makes the game look nicer and helps it run alongside shaders like Complementary Reimagined which supports PBR. I am certainly aware that the pack is intensive but its worth mentioning that in previous versions of Iris and Sodium my game played at around 40FPS-lowest 80FPS-highest @ 20 RendDist - 12Sim.Dist -16ShadowDist - with tons of intensive mods.
Currently, im running my game at 16Rend.Dist - 8Sim.Dist - 10ShadowDist - Very Few Mods @ 1080p - RTX3070 - Ryzen 9 5900x - 8GB allocated. This gets me 160FPS-highest -10-Lowest
In other words my system is taking up significantly more resources since as far back as 1.19.3 and while I am aware this is partly because Minecraft is terribly optimised and makes frequent changes to its code. Slowdowns such as these have never been as bad before while mods such as Iris and Sodium have been installed at least. While it might at first look like a matter of hardware limitation, I have turned settings down super low to compensate for this performance issue but to no avail.
After installing Sodium 0.5.1 and Iris 1.6.7 I can confirm that the issue is still present. I've ruled out other potential sources of the problem by attempting to troubleshoot, but to no avail aswell. I hypothesised the following to be the source of the issue but troubleshooting them did not fix the issue:
-Turning shaderpack's shadow resolution and shadow distance down drastically and turning POM off.
-Changing shaderpack
-Changing Fabric &/or Quilt version
-Changed java (to adoptium) and its arrangements (From 8GB to more or less)
-Loaded up older (less intensive) versions of my resource pack
-Updated drivers
-Updated windows
-Systematically narrowed down mods that might cause the issue. (its definitely Iris or Sodium)
-Systematically bench marked performance with settings enabled vs disabled (There was no culprit)
Its worth mentioning that the areas my system tends to struggle in are mountainous biomes and foliage-intensive biomes. This is presumably due to the vast number of custom 3D models (flowers) and POM textures being loaded which of course takes up a lot of VRAM from my cards 8GB. While its true I only have 8GB of VRAM that was more than enough in previous versions of Iris/Sodium/Minecraft while right now, its bottle necking me.
But it also appears that slowdowns or drops in FPS don't occur with shaders turned off while in the same areas, even though the same resource pack is being used. So it would seem that Sodium's renderer is doing its job from what I can tell. The same issue also did not occur when using older versions of Minecraft and iris. That being said, there are compromises I have found that rectify the issue such as:
-Turning off shaders with resource pack enabled
-Turning down shader settings to potato quality
-Turning down render distance drastically (-8)
-Turning off resource packs with shaders enabled
Some clarification on whether or not this sounds like an issue with iris or if its just a matter of hardware would be very much appreciated. Thanks in advance for any help on the matter!
Currently, im running my game at 16Rend.Dist - 8Sim.Dist - 10ShadowDist - Very Few Mods @ 1080p - RTX3070 - Ryzen 9 5900x - 8GB allocated. This gets me 160FPS-highest -10-Lowest
In other words my system is taking up significantly more resources since as far back as 1.19.3 and while I am aware this is partly because Minecraft is terribly optimised and makes frequent changes to its code. Slowdowns such as these have never been as bad before while mods such as Iris and Sodium have been installed at least. While it might at first look like a matter of hardware limitation, I have turned settings down super low to compensate for this performance issue but to no avail.
After installing Sodium 0.5.1 and Iris 1.6.7 I can confirm that the issue is still present. I've ruled out other potential sources of the problem by attempting to troubleshoot, but to no avail aswell. I hypothesised the following to be the source of the issue but troubleshooting them did not fix the issue:
-Turning shaderpack's shadow resolution and shadow distance down drastically and turning POM off.
-Changing shaderpack
-Changing Fabric &/or Quilt version
-Changed java (to adoptium) and its arrangements (From 8GB to more or less)
-Loaded up older (less intensive) versions of my resource pack
-Updated drivers
-Updated windows
-Systematically narrowed down mods that might cause the issue. (its definitely Iris or Sodium)
-Systematically bench marked performance with settings enabled vs disabled (There was no culprit)
Its worth mentioning that the areas my system tends to struggle in are mountainous biomes and foliage-intensive biomes. This is presumably due to the vast number of custom 3D models (flowers) and POM textures being loaded which of course takes up a lot of VRAM from my cards 8GB. While its true I only have 8GB of VRAM that was more than enough in previous versions of Iris/Sodium/Minecraft while right now, its bottle necking me.
But it also appears that slowdowns or drops in FPS don't occur with shaders turned off while in the same areas, even though the same resource pack is being used. So it would seem that Sodium's renderer is doing its job from what I can tell. The same issue also did not occur when using older versions of Minecraft and iris. That being said, there are compromises I have found that rectify the issue such as:
-Turning off shaders with resource pack enabled
-Turning down shader settings to potato quality
-Turning down render distance drastically (-8)
-Turning off resource packs with shaders enabled
Some clarification on whether or not this sounds like an issue with iris or if its just a matter of hardware would be very much appreciated. Thanks in advance for any help on the matter!
