diff --git a/.gitignore b/.gitignore
index becbb37a0d22..01c0268ea75a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -110,3 +110,6 @@ debian/ppsspp/
 
 # YouCompleteMe file
 .ycm_extra_conf.pyc
+
+# RenderDoc
+*.rdc
diff --git a/ext/native/thin3d/VulkanQueueRunner.cpp b/ext/native/thin3d/VulkanQueueRunner.cpp
index 1a36d139cf18..fdbdf3ebe970 100644
--- a/ext/native/thin3d/VulkanQueueRunner.cpp
+++ b/ext/native/thin3d/VulkanQueueRunner.cpp
@@ -379,14 +379,18 @@ void VulkanQueueRunner::RunSteps(VkCommandBuffer cmd, std::vector<VKRStep *> &st
 	// Planned optimizations: 
 	//  * Create copies of render target that are rendered to multiple times and textured from in sequence, and push those render passes
 	//    as early as possible in the frame (Wipeout billboards).
+	//  * Merge subsequent render passes to the same target that are interspersed with unrelated draws to other render targets (God of War).
 
-	for (int j = 0; j < (int)steps.size() - 1; j++) {
+	for (int j = 0; j < (int)steps.size(); j++) {
 		if (steps[j]->stepType == VKRStepType::RENDER &&
+			steps[j]->render.framebuffer &&
 			steps[j]->render.finalColorLayout == VK_IMAGE_LAYOUT_UNDEFINED) {
 			// Just leave it at color_optimal.
 			steps[j]->render.finalColorLayout = VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL;
 		}
+	}
 
+	for (int j = 0; j < (int)steps.size() - 1; j++) {
 		// Push down empty "Clear/Store" renderpasses, and merge them with the first "Load/Store" to the same framebuffer.
 		// Actually let's just bother with the first one for now. This affects Wipeout Pure.
 		if (steps.size() > 1 && steps[j]->stepType == VKRStepType::RENDER &&
@@ -458,6 +462,11 @@ void VulkanQueueRunner::RunSteps(VkCommandBuffer cmd, std::vector<VKRStep *> &st
 		case VKRStepType::RENDER_SKIP:
 			break;
 		}
+	}
+
+	// Deleting all in one go should be easier on the instruction cache than deleting
+	// them as we go - and easier to debug because we can look backwards in the frame.
+	for (size_t i = 0; i < steps.size(); i++) {
 		delete steps[i];
 	}
 }
@@ -788,6 +797,9 @@ void VulkanQueueRunner::PerformRenderPass(const VKRStep &step, VkCommandBuffer c
 			VkPipelineStageFlags dstStage{};
 			switch (barrier.oldLayout) {
 			case VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL:
+				barrier.srcAccessMask = VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT | VK_ACCESS_COLOR_ATTACHMENT_READ_BIT;
+				srcStage = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT;
+				break;
 			case VK_IMAGE_LAYOUT_UNDEFINED:
 				barrier.srcAccessMask = VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT | VK_ACCESS_COLOR_ATTACHMENT_READ_BIT;
 				srcStage = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT;
@@ -829,6 +841,22 @@ void VulkanQueueRunner::PerformRenderPass(const VKRStep &step, VkCommandBuffer c
 		return;
 	}
 
+	if (step.render.framebuffer && step.render.framebuffer->color.layout == VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL) {
+		VkImageMemoryBarrier barrier{};
+		barrier.sType = VK_STRUCTURE_TYPE_IMAGE_MEMORY_BARRIER;
+		barrier.oldLayout = VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL;
+		barrier.newLayout = VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL;
+		barrier.subresourceRange.layerCount = 1;
+		barrier.subresourceRange.levelCount = 1;
+		barrier.image = step.render.framebuffer->color.image;
+		barrier.srcAccessMask = VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT;
+		barrier.dstAccessMask = VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT | VK_ACCESS_COLOR_ATTACHMENT_READ_BIT;
+		barrier.subresourceRange.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
+		barrier.srcQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED;
+		barrier.dstQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED;
+		vkCmdPipelineBarrier(cmd, VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT, VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT, 0, 0, nullptr, 0, nullptr, 1, &barrier);
+	}
+
 	// This is supposed to bind a vulkan render pass to the command buffer.
 	PerformBindFramebufferAsRenderTarget(step, cmd);
 
@@ -947,6 +975,8 @@ void VulkanQueueRunner::PerformBindFramebufferAsRenderTarget(const VKRStep &step
 	int w;
 	int h;
 	if (step.render.framebuffer) {
+		_dbg_assert_(G3D, step.render.finalColorLayout != VK_IMAGE_LAYOUT_UNDEFINED);
+
 		VKRFramebuffer *fb = step.render.framebuffer;
 		framebuf = fb->framebuf;
 		w = fb->width;
diff --git a/ext/native/thin3d/VulkanRenderManager.cpp b/ext/native/thin3d/VulkanRenderManager.cpp
index 786513eaa762..1f8795a34ed5 100644
--- a/ext/native/thin3d/VulkanRenderManager.cpp
+++ b/ext/native/thin3d/VulkanRenderManager.cpp
@@ -397,6 +397,8 @@ void VulkanRenderManager::BindFramebufferAsRenderTarget(VKRFramebuffer *fb, VKRR
 			return;
 		}
 	}
+
+	// More redundant bind elimination.
 	if (curRenderStep_ && curRenderStep_->commands.size() == 0 && curRenderStep_->render.color == VKRRenderPassAction::KEEP && curRenderStep_->render.depth == VKRRenderPassAction::KEEP && curRenderStep_->render.stencil == VKRRenderPassAction::KEEP) {
 		// Can trivially kill the last empty render step.
 		assert(steps_.back() == curRenderStep_);
@@ -409,10 +411,9 @@ void VulkanRenderManager::BindFramebufferAsRenderTarget(VKRFramebuffer *fb, VKRR
 	}
 
 	VKRStep *step = new VKRStep{ VKRStepType::RENDER };
-	// This is what queues up new passes, and can end previous ones.
 	step->render.framebuffer = fb;
 	step->render.color = color;
-	step->render.depth= depth;
+	step->render.depth = depth;
 	step->render.stencil = stencil;
 	step->render.clearColor = clearColor;
 	step->render.clearDepth = clearDepth;
@@ -423,8 +424,13 @@ void VulkanRenderManager::BindFramebufferAsRenderTarget(VKRFramebuffer *fb, VKRR
 	steps_.push_back(step);
 
 	curRenderStep_ = step;
-	curWidth_ = fb ? fb->width : vulkan_->GetBackbufferWidth();
-	curHeight_ = fb ? fb->height : vulkan_->GetBackbufferHeight();
+	if (fb) {
+		curWidth_ = fb->width;
+		curHeight_ = fb->height;
+	} else {
+		curWidth_ = vulkan_->GetBackbufferWidth();
+		curHeight_ = vulkan_->GetBackbufferHeight();
+	}
 }
 
 bool VulkanRenderManager::CopyFramebufferToMemorySync(VKRFramebuffer *src, int aspectBits, int x, int y, int w, int h, Draw::DataFormat destFormat, uint8_t *pixels, int pixelStride) {