I want to render shapes through blocks. I found this code in minecraft source 

public static void renderShape(PoseStack poseStack, VertexConsumer vertexConsumer, VoxelShape shape, double minX, double minY, double minZ, float red, float green, float blue, float alpha) {
        PoseStack.Pose pose = poseStack.last();
        shape.forAllEdges((x1, y1, z1, x2, y2, z2) -> {
            float dx = (float)(x2 - x1);
            float dy = (float)(y2 - y1);
            float dz = (float)(z2 - z1);
            float length = Mth.sqrt(dx * dx + dy * dy + dz * dz);
            dx /= length;
            dy /= length;
            dz /= length;
            vertexConsumer.vertex(pose.pose(), (float)(x1 + minX), (float)(y1 + minY), (float)(z1 + minZ)).color(red, green, blue, alpha).normal(pose.normal(), dx, dy, dz).endVertex();
            vertexConsumer.vertex(pose.pose(), (float)(x2 + minX), (float)(y2 + minY), (float)(z2 + minZ)).color(red, green, blue, alpha).normal(pose.normal(), dx, dy, dz).endVertex();
        });
    }

that draws a rectangle around the block, but it is not visible through other blocks. Could someone point me in the right direction on how one renders things through blocks?
Thanks in advance 🙏

Edited June 2, 20241 yr by CodecDev

Solved! Here is my solution: Create my own RenderType.CompositeRenderType that does what i need it to. First you will need to add an access transfomer in your build.gradle (https://docs.minecraftforge.net/en/latest/advanced/accesstransformers/) and paste this there 

public net.minecraft.client.renderer.RenderType$CompositeRenderType
public net.minecraft.client.renderer.RenderType m_173209_(Ljava/lang/String;Lcom/mojang/blaze3d/vertex/VertexFormat;Lcom/mojang/blaze3d/vertex/VertexFormat$Mode;ILnet/minecraft/client/renderer/RenderType$CompositeState;)Lnet/minecraft/client/renderer/RenderType$CompositeRenderType; # create
public net.minecraft.client.renderer.RenderStateShard$LineStateShard

after that you just create your own CompositeRenderType, here is the code for mine 

public static RenderType.CompositeRenderType myOutline = RenderType.CompositeRenderType.create("myLines", DefaultVertexFormat.POSITION_COLOR_NORMAL, VertexFormat.Mode.LINES, 256, RenderType.CompositeState.builder().setShaderState(new RenderStateShard.ShaderStateShard(GameRenderer::getRendertypeLinesShader)).setLineState(new RenderStateShard.LineStateShard(OptionalDouble.empty())).setLayeringState(new RenderStateShard.LayeringStateShard("view_offset_z_layering", () -> {
        PoseStack $$0 = RenderSystem.getModelViewStack();
        $$0.pushPose();
        $$0.scale(0.99975586F, 0.99975586F, 0.99975586F);
        RenderSystem.applyModelViewMatrix();
    }, () -> {
        PoseStack $$0 = RenderSystem.getModelViewStack();
        $$0.popPose();
        RenderSystem.applyModelViewMatrix();
    })).setTransparencyState(new RenderStateShard.TransparencyStateShard("translucent_transparency", () -> {
        RenderSystem.enableBlend();
        RenderSystem.blendFuncSeparate(GlStateManager.SourceFactor.SRC_ALPHA, GlStateManager.DestFactor.ONE_MINUS_SRC_ALPHA, GlStateManager.SourceFactor.ONE, GlStateManager.DestFactor.ONE_MINUS_SRC_ALPHA);
        RenderSystem.disableDepthTest();
        }, () -> {
        RenderSystem.disableBlend();
        RenderSystem.defaultBlendFunc();
        RenderSystem.enableDepthTest();
    })).setOutputState(new RenderStateShard.OutputStateShard("item_entity_target", () -> {
        if (Minecraft.useShaderTransparency()) {
            Minecraft.getInstance().levelRenderer.getItemEntityTarget().bindWrite(false);
        }

    }, () -> {
        if (Minecraft.useShaderTransparency()) {
            Minecraft.getInstance().getMainRenderTarget().bindWrite(false);
        }

    })).setDepthTestState(new RenderStateShard.DepthTestStateShard("always", 519)).setWriteMaskState(new RenderStateShard.WriteMaskStateShard(true, false)).setCullState(new RenderStateShard.CullStateShard(false)).createCompositeState(false));

I hope this helped 🙏 if you have any questions dm me on discord .ducklett