[1.15.2]Block doesn't render properly on Mooshroom's back

[NonToxicEel]

So I basically wanna make a mod that generates mooshrooms with mushrooms that have different colors on their back. But my progress stuck as it seems like that Minecraft render has issues dealing with colored blocks. Here are my codes:

public class RendererResourceMooshroom extends MobRenderer<EntityResourceMooshroom, CowModel<EntityResourceMooshroom>> {

    Block mushroom;

    public RendererResourceMooshroom(EntityRendererManager renderManagerIn, Block mushroom) {
        super(renderManagerIn,new CowModel<>(), 0.7F);
        this.mushroom = mushroom;
        this.addLayer(new ResourceMooshroomLayer<>(this, mushroom));
    }

    @Override
    public ResourceLocation getEntityTexture(EntityResourceMooshroom entity) {
        return new ResourceLocation("textures/entity/cow/brown_mooshroom.png");
    }

    class ResourceMooshroomLayer<T extends EntityResourceMooshroom> extends MooshroomMushroomLayer<T>{
        Block mushroom;
        public ResourceMooshroomLayer(IEntityRenderer rendererIn, Block mushroom) {
            super(rendererIn);
            this.mushroom = mushroom;
        }

        public void render(MatrixStack matrixStackIn, IRenderTypeBuffer bufferIn, int packedLightIn, T entitylivingbaseIn, float limbSwing, float limbSwingAmount, float partialTicks, float ageInTicks, float netHeadYaw, float headPitch) {
            if (!entitylivingbaseIn.isChild() && !entitylivingbaseIn.isInvisible()) {
                BlockRendererDispatcher blockrendererdispatcher = Minecraft.getInstance().getBlockRendererDispatcher();
                BlockState blockstate = mushroom.getDefaultState();
                int i = LivingRenderer.getPackedOverlay(entitylivingbaseIn, 0.0F);
                matrixStackIn.push();
                matrixStackIn.translate(0.2F, -0.35F, 0.5D);
                matrixStackIn.rotate(Vector3f.YP.rotationDegrees(-48.0F));
                matrixStackIn.scale(-1.0F, -1.0F, 1.0F);
                matrixStackIn.translate(-0.5D, -0.5D, -0.5D);
                blockrendererdispatcher.renderBlock(blockstate, matrixStackIn, bufferIn, packedLightIn, i);
                matrixStackIn.pop();
                matrixStackIn.push();
                matrixStackIn.translate(0.2F, -0.35F, 0.5D);
                matrixStackIn.rotate(Vector3f.YP.rotationDegrees(42.0F));
                matrixStackIn.translate(0.1F, 0.0D, -0.6F);
                matrixStackIn.rotate(Vector3f.YP.rotationDegrees(-48.0F));
                matrixStackIn.scale(-1.0F, -1.0F, 1.0F);
                matrixStackIn.translate(-0.5D, -0.5D, -0.5D);
                blockrendererdispatcher.renderBlock(blockstate, matrixStackIn, bufferIn, packedLightIn, i);
                matrixStackIn.pop();
                matrixStackIn.push();
                this.getEntityModel().getHead().setAnglesAndRotation(matrixStackIn);
                matrixStackIn.translate(0.0D, -0.7F, -0.2F);
                matrixStackIn.rotate(Vector3f.YP.rotationDegrees(-78.0F));
                matrixStackIn.scale(-1.0F, -1.0F, 1.0F);
                matrixStackIn.translate(-0.5D, -0.5D, -0.5D);
                blockrendererdispatcher.renderBlock(blockstate, matrixStackIn, bufferIn, packedLightIn, i);
                matrixStackIn.pop();
            }
        }
    }

}

And it turned out to be without color overlay:

While I truely want the color be the same as those I placed on the ground:

The source code is available on GitHub for anyone who interests in getting more codes:https://github.com/dong031001/Mooshroomcraft

Edited March 14, 2020 by NonToxicEel

[NonToxicEel]

Overwrote BlockRenderer and rederModel() function; everything turns out fine 'ight now.

public class RendererResourceMooshroom extends MobRenderer<EntityResourceMooshroom, CowModel<EntityResourceMooshroom>> {

    Block mushroom;

    public RendererResourceMooshroom(EntityRendererManager renderManagerIn, Block mushroom) {
        super(renderManagerIn,new CowModel<>(), 0.7F);
        this.mushroom = mushroom;
        this.addLayer(new ResourceMooshroomLayer<>(this, mushroom));
    }

    @Override
    public ResourceLocation getEntityTexture(EntityResourceMooshroom entity) {
        return new ResourceLocation("textures/entity/cow/brown_mooshroom.png");
    }

    class ResourceMooshroomLayer<T extends EntityResourceMooshroom> extends MooshroomMushroomLayer<T>{
        Block mushroom;
        public ResourceMooshroomLayer(IEntityRenderer rendererIn, Block mushroom) {
            super(rendererIn);
            this.mushroom = mushroom;
        }

        public void render(MatrixStack matrixStackIn, IRenderTypeBuffer bufferIn, int packedLightIn, T entitylivingbaseIn, float limbSwing, float limbSwingAmount, float partialTicks, float ageInTicks, float netHeadYaw, float headPitch) {
            if (!entitylivingbaseIn.isChild() && !entitylivingbaseIn.isInvisible()) {
                BlockRendererDispatcher blockrendererdispatcher = Minecraft.getInstance().getBlockRendererDispatcher();
                ItemRenderer itemRenderer = Minecraft.getInstance().getItemRenderer();
                BlockState blockstate = mushroom.getDefaultState().getBlockState();
                int i = LivingRenderer.getPackedOverlay(entitylivingbaseIn, 0.0F);
                matrixStackIn.push();
                matrixStackIn.translate(0.2F, -0.35F, 0.5D);
                matrixStackIn.rotate(Vector3f.YP.rotationDegrees(-48.0F));
                matrixStackIn.scale(-1.0F, -1.0F, 1.0F);
                matrixStackIn.translate(-0.5D, -0.5D, -0.5D);
                renderMushroom(blockrendererdispatcher,blockstate, matrixStackIn, bufferIn, packedLightIn, i, net.minecraftforge.client.model.data.EmptyModelData.INSTANCE);

                matrixStackIn.pop();
                matrixStackIn.push();
                matrixStackIn.translate(0.2F, -0.35F, 0.5D);
                matrixStackIn.rotate(Vector3f.YP.rotationDegrees(42.0F));
                matrixStackIn.translate(0.1F, 0.0D, -0.6F);
                matrixStackIn.rotate(Vector3f.YP.rotationDegrees(-48.0F));
                matrixStackIn.scale(-1.0F, -1.0F, 1.0F);
                matrixStackIn.translate(-0.5D, -0.5D, -0.5D);
                renderMushroom(blockrendererdispatcher,blockstate, matrixStackIn, bufferIn, packedLightIn, i, net.minecraftforge.client.model.data.EmptyModelData.INSTANCE);
                matrixStackIn.pop();
                matrixStackIn.push();
                this.getEntityModel().getHead().translateRotate(matrixStackIn);
                matrixStackIn.translate(0.0D, -0.7F, -0.2F);
                matrixStackIn.rotate(Vector3f.YP.rotationDegrees(-78.0F));
                matrixStackIn.scale(-1.0F, -1.0F, 1.0F);
                matrixStackIn.translate(-0.5D, -0.5D, -0.5D);
                renderMushroom(blockrendererdispatcher,blockstate, matrixStackIn, bufferIn, packedLightIn, i, net.minecraftforge.client.model.data.EmptyModelData.INSTANCE);
                matrixStackIn.pop();
            }
        }

        private void renderMushroom(BlockRendererDispatcher dispatcher, BlockState blockStateIn, MatrixStack matrixStackIn, IRenderTypeBuffer bufferTypeIn, int combinedLightIn, int combinedOverlayIn, net.minecraftforge.client.model.data.IModelData modelData){
            IBakedModel ibakedmodel = dispatcher.getModelForState(blockStateIn);
            int i = ((BlockResourceMushroom) blockStateIn.getBlock()).color;
            float f = (float)(i >> 16 & 255) / 255.0F;
            float f1 = (float)(i >> 8 & 255) / 255.0F;
            float f2 = (float)(i & 255) / 255.0F;
            renderModel(matrixStackIn.getLast(), bufferTypeIn.getBuffer(RenderTypeLookup.getRenderType(blockStateIn)), blockStateIn, ibakedmodel, f, f1, f2, combinedLightIn, combinedOverlayIn, modelData);
        }

        private void renderModel(MatrixStack.Entry matrixEntry, IVertexBuilder buffer, @Nullable BlockState state, IBakedModel modelIn, float red, float green, float blue, int combinedLightIn, int combinedOverlayIn, net.minecraftforge.client.model.data.IModelData modelData){
            Random random = new Random();
            random.setSeed(42L);
            List<BakedQuad> quadList = modelIn.getQuads(state, null, random);
            for(BakedQuad bakedquad : quadList) {
                float f;
                float f1;
                float f2;
                if (bakedquad.getTintIndex()==1) {
                    f = MathHelper.clamp(red, 0.0F, 1.0F);
                    f1 = MathHelper.clamp(green, 0.0F, 1.0F);
                    f2 = MathHelper.clamp(blue, 0.0F, 1.0F);
                } else {
                    f = 1.0F;
                    f1 = 1.0F;
                    f2 = 1.0F;
                }
                buffer.addQuad(matrixEntry, bakedquad, f, f1, f2, combinedLightIn, combinedOverlayIn);
            }
        }
    }

}