diff --git a/filament/backend/src/vulkan/VulkanDescriptorSetLayoutSerializer.cpp b/filament/backend/src/vulkan/VulkanDescriptorSetLayoutSerializer.cpp
index b951c7ece2..f6d96cb834 100644
--- a/filament/backend/src/vulkan/VulkanDescriptorSetLayoutSerializer.cpp
+++ b/filament/backend/src/vulkan/VulkanDescriptorSetLayoutSerializer.cpp
@@ -18,15 +18,19 @@ VulkanDescriptorSetLayoutSerializer::VulkanDescriptorSetLayoutSerializer(
             buffer << "{" << std::endl;
             buffer << "\"binding\":" << info.pBindings[i].binding << "," << std::endl;
             buffer << "\"descriptor_type\":" << info.pBindings[i].descriptorType << "," << std::endl;
-            buffer << "\"stage_flags\":" << info.pBindings[i].stageFlags << "," << std::endl;
-            buffer << "\"immutable_samplers\":[" << std::endl;
-            for (uint32_t i = 0; i < immutableSamplers.size(); ++i) {
-                buffer << immutableSamplers[i];
-                if (i < immutableSamplers.size() - 1) {
-                    buffer << ",";
+            buffer << "\"stage_flags\":" << info.pBindings[i].stageFlags;
+            if (immutableSamplers.size()) {
+                buffer << "," << std::endl;
+                buffer << "\"immutable_samplers\":[" << std::endl;
+                for (uint32_t i = 0; i < immutableSamplers.size(); ++i) {
+                    buffer << immutableSamplers[i];
+                    if (i < immutableSamplers.size() - 1) {
+                        buffer << ",";
+                    }
                 }
+                buffer << "]";
             }
-            buffer << "]" << std::endl;
+            buffer << std::endl;
             buffer << "}";
             if (i < info.bindingCount - 1) {
                 buffer << ",";
diff --git a/filament/backend/src/vulkan/VulkanDriver.cpp b/filament/backend/src/vulkan/VulkanDriver.cpp
index d2bf19ae68..e381e8a013 100644
--- a/filament/backend/src/vulkan/VulkanDriver.cpp
+++ b/filament/backend/src/vulkan/VulkanDriver.cpp
@@ -1666,7 +1666,7 @@ void VulkanDriver::beginRenderPass(Handle<HwRenderTarget> rth, const RenderPassP
     rpkey.subpassMask = uint8_t(params.subpassMask);
 
     VkRenderPass renderPass = mFramebufferCache.getRenderPass(rpkey);
-    mPipelineCache.bindRenderPass(renderPass, 0);
+    mPipelineCache.bindRenderPass(renderPass, mFramebufferCache.getRenderPassKey(renderPass), 0);
 
     // Create the VkFramebuffer or fetch it from cache.
     VulkanFboCache::FboKey fbkey = rt->getFboKey();
@@ -1785,6 +1785,7 @@ void VulkanDriver::nextSubpass(int) {
             VK_SUBPASS_CONTENTS_INLINE);
 
     mPipelineCache.bindRenderPass(mCurrentRenderPass.renderPass,
+            mFramebufferCache.getRenderPassKey(mCurrentRenderPass.renderPass),
             ++mCurrentRenderPass.currentSubpass);
 
     if (mCurrentRenderPass.params.subpassMask & 0x1) {
diff --git a/filament/backend/src/vulkan/VulkanPipelineCache.cpp b/filament/backend/src/vulkan/VulkanPipelineCache.cpp
index 414e4450d5..b3ddd9bb2d 100644
--- a/filament/backend/src/vulkan/VulkanPipelineCache.cpp
+++ b/filament/backend/src/vulkan/VulkanPipelineCache.cpp
@@ -202,6 +202,8 @@ VulkanPipelineCache::PipelineCacheEntry* VulkanPipelineCache::createPipeline() n
 
     //layout
     serializer.setPipelineLayoutKey(mPipelineLayoutKey);
+    // renderPass
+    serializer.setRenderPassKey(mRenderPassKey);
 
     VkGraphicsPipelineCreateInfo pipelineCreateInfo = {
         .sType = VK_STRUCTURE_TYPE_GRAPHICS_PIPELINE_CREATE_INFO,
@@ -256,7 +258,10 @@ VulkanPipelineCache::PipelineCacheEntry* VulkanPipelineCache::createPipeline() n
         FVK_LOGE << "vkCreateGraphicsPipelines error " << error;
         return nullptr;
     }
-    serializer.setID(cacheEntry.handle);
+
+    PipelineHashFn hashFunc;
+
+    serializer.setID(hashFunc(mPipelineRequirements));
     return &mPipelines.emplace(mPipelineRequirements, cacheEntry).first.value();
 }
 
@@ -281,9 +286,10 @@ void VulkanPipelineCache::bindRasterState(RasterState const& rasterState) noexce
     mPipelineRequirements.rasterState = rasterState;
 }
 
-void VulkanPipelineCache::bindRenderPass(VkRenderPass renderPass, int subpassIndex) noexcept {
+void VulkanPipelineCache::bindRenderPass(VkRenderPass renderPass, uint32_t passKey, int subpassIndex) noexcept {
     mPipelineRequirements.renderPass = renderPass;
     mPipelineRequirements.subpassIndex = subpassIndex;
+    mRenderPassKey = passKey;
 }
 
 void VulkanPipelineCache::bindPrimitiveTopology(VkPrimitiveTopology topology) noexcept {
diff --git a/filament/backend/src/vulkan/VulkanPipelineCache.h b/filament/backend/src/vulkan/VulkanPipelineCache.h
index 155b9c0993..169f90863d 100644
--- a/filament/backend/src/vulkan/VulkanPipelineCache.h
+++ b/filament/backend/src/vulkan/VulkanPipelineCache.h
@@ -96,7 +96,7 @@ public:
     // Each of the following methods are fast and do not make Vulkan calls.
     void bindProgram(fvkmemory::resource_ptr<VulkanProgram> program) noexcept;
     void bindRasterState(RasterState const& rasterState) noexcept;
-    void bindRenderPass(VkRenderPass renderPass, int subpassIndex) noexcept;
+    void bindRenderPass(VkRenderPass renderPass, uint32_t passKey, int subpassIndex) noexcept;
     void bindPrimitiveTopology(VkPrimitiveTopology topology) noexcept;
     void bindVertexArray(VkVertexInputAttributeDescription const* attribDesc,
             VkVertexInputBindingDescription const* bufferDesc, uint8_t count);
@@ -211,6 +211,7 @@ private:
     uint64_t mVertexShaderHash;
     uint64_t mFragmentShaderHash;
     uint32_t mPipelineLayoutKey;
+    uint32_t mRenderPassKey;
 
     // Current bindings for the pipeline and descriptor sets.
     PipelineKey mBoundPipeline = {};
diff --git a/filament/backend/src/vulkan/VulkanPipelineStateSerializer.cpp b/filament/backend/src/vulkan/VulkanPipelineStateSerializer.cpp
index 790265cabc..149cf2521e 100644
--- a/filament/backend/src/vulkan/VulkanPipelineStateSerializer.cpp
+++ b/filament/backend/src/vulkan/VulkanPipelineStateSerializer.cpp
@@ -98,9 +98,13 @@ void VulkanPipelineStateSerializer::setPipelineLayoutKey(uint32_t pipelineLayout
     mBuffer << "\"layout\":" << pipelineLayoutKey << "," << std::endl;
 }
 
-void VulkanPipelineStateSerializer::setID(VkPipeline cache) {
+void VulkanPipelineStateSerializer::setRenderPassKey(uint32_t renderPassKey) {
+    mBuffer << "\"render_pass\":" << renderPassKey << "," << std::endl;
+}
+
+void VulkanPipelineStateSerializer::setID(uint32_t key) {
     std::stringstream temp;
-    temp << "pipeline_"  << cache << ".json";
+    temp << "pipeline_" << key << ".json";
     temp >> mFileName;
 }
 
diff --git a/filament/backend/src/vulkan/VulkanPipelineStateSerializer.h b/filament/backend/src/vulkan/VulkanPipelineStateSerializer.h
index 1bb858dd2d..2db841d353 100644
--- a/filament/backend/src/vulkan/VulkanPipelineStateSerializer.h
+++ b/filament/backend/src/vulkan/VulkanPipelineStateSerializer.h
@@ -39,8 +39,9 @@ public:
     VulkanPipelineStateSerializer(const utils::CString& name);
     ~VulkanPipelineStateSerializer();
 
-    void setID(VkPipeline cache);
+    void setID(uint32_t key);
     void setPipelineLayoutKey(uint32_t pipelineLayoutKey);
+    void setRenderPassKey(uint32_t renderPassKey); 
     VulkanPipelineStateSerializer& operator<<(
             const VkPipelineInputAssemblyStateCreateInfo& inputAsm);
     VulkanPipelineStateSerializer& operator<<(const VkPipelineViewportStateCreateInfo& viewport);
diff --git a/filament/backend/src/vulkan/VulkanSamplerStateSerializer.cpp b/filament/backend/src/vulkan/VulkanSamplerStateSerializer.cpp
index f6b8df2cf6..3246435ecd 100644
--- a/filament/backend/src/vulkan/VulkanSamplerStateSerializer.cpp
+++ b/filament/backend/src/vulkan/VulkanSamplerStateSerializer.cpp
@@ -54,7 +54,6 @@ VulkanSamplerStateSerializer::VulkanSamplerStateSerializer(const VulkanSamplerCa
         buffer << "\"anisotropy_log2\":" << uint32_t(samplerParams.anisotropyLog2) << "," << std::endl;
         buffer << "\"compare_mode\":" << uint32_t(samplerParams.compareMode) << "," << std::endl;
         buffer << "\"compare_func\":" << uint32_t(samplerParams.compareFunc) << "," << std::endl;
-        buffer << "\"filter_min\":" << uint32_t(samplerParams.filterMin) << "," << std::endl;
         buffer << "\"ycbcr_conv_key\":" << ycbcr_conv_key << std::endl;
         buffer << "}" << std::endl;