The VulkanMod changed Minecraft render API from OpenGL to Vulkan, which provided a huge improvement in performance.

However, it required mod to make some adaptations to work with VulkanMod.

I install both CustomPlayerModels and VulkanMod, and the player model display is a totally black model and some GUI is broken.

The Minecraft version is 1.19.3, the CustomPlayerModels version is 0.6.5a, the VulkanMod version is 0.2.1, the fabric version is 0.14.13, and the fabric API version is 0.73.2.

The Vulkan mod is missing RenderSystem.enableScissor, and DynamicTexture.setPixels implementation, you have to report this to them.

Ok, I will start an issue in the Vulkan mod.