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The Iris Project

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Weird block culling(maybe) issue

I was writing a shader and noticed that in certain locations and when looking the right way, certain parts of shadows would disappear. I personally was writing a voxelization shader and ray casting for pixel perfect shadows(not pixel perfect yet, still in dev), and saw the bug. I debugged my code for a while, and had no idea why this was happening. I then tried a few other voxelization shaders, saw the same bug and thought maybe it was just voxelization. Then, i tried ordinary shadow mapping sha...

Lag when loading chunks (with and without shaders)

So in vanilla everything is hunky dory and all is performing well with no frame drops, but whenever I use Iris it has trouble loading chunks and lags. I've tried it with Iris alone and with performance mods like sodium (all listed below) and it still has trouble. Depending on how much stuff there is in the chunk the worse the lag becomes. I looked it up and saw some github post about deferred chunk rendering so I went and turned that on (and raised the threads from 0 to 3) and the lag got WORSE 😭 so I am not super sure what to do now, help would be appreciated! ---PC Specs---...

block.proprieties

Is there something like the block.prorieties file in the optifine folder for iris? Would really help for rp makers.

iris on optifine packs

does iris allow the custom item from optifine resource packs to work? i want to have sodium for fps, but i also wanna see if i can make custom item resource packs

iris doesnt open

when i tried opening iris with java it dint open and i dont know what to do

No Light Updates for some reason??

i dont know what mod causes this but i can attach a log file if needed.
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Render latency issues with unlocked fps and shaders

So, I noticed that playing with shaders on, my mouse movements start to feel almost slippery and delayed, so after pressing Alt + R, to check with the NVIDIA Overlay, it appears the game seems to struggle from major render latency compared to any other game. The only "fix" I've found so far, was to just lock the framerate.
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i cant load shaders in 1.20.1 it sais toreport the issue to developers and idk how to do that

it started fine but when i got a new shader that my friend sent me asking to try it and that it is good but when i tried it with some adjustments the shaders stoped working and i got confused and i didnt know if it was the shader or the mod/iris so i tried allot more shaders and i realised that it wass iris that broke idk how but now i cant fix it how do i fix it
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Consistent Crashing some locations with Iris

I've honestly got no clue whats causing this problem. The crash occurs when Im in a specific part of my world. Ive tried deleting and re generating the area in question which hasn't changed anything. Its a server world, but this is a client crash. There are no player created structures in this spot as Im the only one in the area. Iris is the only mod that appears in the crash log so Im starting here. Any ideas would be appreciated.

Vivecraft issue

My iris has some issues with shadows and lighting when loading in vr. Going to test out flatscreen. (Seems like it only happens in latest update 1.5.2 is working flawlessly but shaders were updated)

Opacity on OBJ model with Iris shader

hi, I would like to know if Iris shader support opacity for 3d models in obj to have transparent texture.

Specular/Normalmap with custom renderer

```java WorldRenderEvents.BEFORE_ENTITIES.register(context -> { MinecraftClient mc = MinecraftClient.getInstance(); RenderLayer renderLayer = NewRenderLayer.getNewLayer(new Identifier("luminance", "textures/re45.png")); VertexConsumerProvider.Immediate immediate = mc.getBufferBuilders().getEntityVertexConsumers();...
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Hey im trying to use iris to use optifine shaders

When i was using iris it doesnt shoow a shaders button

PBR support?

Is there any rpacks that can be used in iris for pbr? Back in Optifine sesus and faithful pbr worked but on iris only like a block or two worked , any other combos or suggestions or settings I need to turn on?

Rendering emissive meshes

Hey, could anyone please help me with a specific rendering bug? (1.20.1) I want to render emissive lines and quads that receive bloom post processing from shaders I tried the following, which should render the plane just like the eyes of an enderman: ```java...
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Enabling shaders makes some aspects of the HUD/GUI Disappear

Fabric loader: 0.14.21 MC Version: 1.20.1 GPU: RTX 3070 Ti Also it sends me this log/error whenever i change the shaders settings: " terrain_solid.fsh: terrain_solid.fsh: 0(1407) : error C1503: undefined variable "hash32" "...
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FPS ISSUE WITH IRIS

Hi, I've been using iris for 3 months now and I've noticed that I'm not as fluid (Hz level) compared to optifine or even original minecraft. When I put myself in windowed mode, I get the impression that I'm really at 144Hz. I've been trying to find out if there was a vertical sync that was blocking me at 60Hz but it wasn't possible, so I'd like to know if it's possible to fix this problem? I can't show you a video. ...

Game crashes when I load a shaders pack for 1.20.1 version of Minecraft

Hi! So uh, I'm having issues with Iris for Minecraft 1.20.1 I can use the mod just fine and it doesn't crash my game until I click on one of the Shaders I have installed. For some friends the shaders work just fine, no crashing, no problems. Iris and shaders works completely fine for me when I use Iris for 1.19.4 or below with any shaders pack. I use the ATLauncher modpack launcher to play Minecraft, and of course again, Iris works perfectly fine, shaders works perfectly fine but only 1.19.4 or below. I've made a new instance with no mods, no texture packs, nothing besides just Iris, Sodium, and shaders packs to test if it's a mod I use that's causing the crash. It's not. If I click on a shaders pack to use it, my game crashes instantly....

Issue when trying to render multiple RenderLayers using Fabric/Quilt

This is a bug specific to a mod I am working on, and causes specific parts of a model to not render entirely. The method I am using is injections into PlayerEntityRenderer$render which will render two extra RenderLayers: getEntityCutout() and getEntityTranslucentEmissive(). Code for this issue can be found here: https://github.com/avetharun/OriginalFur/blob/beb3a50f4f3d4447541a9516320d1073ca2fd8cb/src/main/java/com/studiopulsar/feintha/originalfur/fabric/mixin/PlayerEntityRendererMixin.java#...
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