Fix model track-group movement and RGB destination-alpha blending

src/host/vk_pipelines.cpp

@@ -2,6 +2,7 @@
 #include "vulkan_window.h"
 
 #include "host_util.h"
+#include "blend_state.h"
 
 #include <cstring>
 #include <stdexcept>
@@ -212,7 +213,7 @@ VkPipeline VulkanWindow::get_pipeline(std::uint8_t cull, std::uint8_t depth, std
     }
 
     auto d3d_to_vk_blend = [](std::uint8_t d3d, VkBlendFactor fallback) -> VkBlendFactor {
-        switch (d3d) {
+        switch (d3d_blend_for_rgb_target(d3d)) {
             case 1: return VK_BLEND_FACTOR_ZERO;
             case 2: return VK_BLEND_FACTOR_ONE;
             case 3: return VK_BLEND_FACTOR_SRC_COLOR;