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[1.20.1] Rendering quads using VertexConsumer/RenderTypes


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Hi,

I'm trying to render a single quad in the world.

I'm mixing into the ChestRenderer class. If I understand correctly, BufferSource#getBuffer opens a buffer according to the supplied RenderType (Quads with POSITION_COLOR in my case).
Then, I can supply my vertices (a simple 1-block plane along the Z Axis) and close the buffer using BufferSource#endBatch for rendering.
This is the code I'm using:

@Inject(at = @At("TAIL"),
      method = "render(...)V")
  public void render(T blockEntity, float partialTick, PoseStack poseStack, MultiBufferSource multiBufferSource, int packedLight, int packedOverlay, CallbackInfo ci) {

    BlockPos pos = blockEntity.getBlockPos();
    AABB box = new AABB(pos, pos.offset(1, 1, 1));

    BufferSource buffer = Minecraft.getInstance().renderBuffers().bufferSource();
    VertexConsumer consumer = buffer.getBuffer(RenderType.guiOverlay());

    poseStack.pushPose();
    poseStack.translate(-pos.getX(), -pos.getY(), -pos.getZ());

    consumer.vertex(box.minX, box.maxY, box.minZ).color(1, 1, 1, 1).endVertex();
    consumer.vertex(box.minX, box.maxY, box.maxZ).color(1, 1, 1, 1).endVertex();
    consumer.vertex(box.minX, box.minY, box.maxZ).color(1, 1, 1, 1).endVertex();
    consumer.vertex(box.minX, box.minY, box.minZ).color(1, 1, 1, 1).endVertex();

    buffer.endBatch(RenderType.guiOverlay());

    poseStack.popPose();
  }

However, the plane does not get rendered. However, if I replace those 4 vertices with a call to LevelRenderer#renderLineBox and set the RenderType to LINES, it works.
Do I need something else to render planes other than the 4 edges of the quad? I used QUADS back in 1.8 where it was still the raw OpenGL type and it worked then. Or am I missing something else entirely?

Thanks!

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