We start this recipe by loading and preparing buffers for two models: the first being the one simulating our main scene (reflective/refractive model); and second being used to draw the environment itself (a skybox). We need to copy vertex data using staging buffers to both vertex buffers.
Next, we need to create a cubemap. We do this by creating a combined image sampler. The image must be of a 2D type, must have six array layers, and must support VK_IMAGE_USAGE_SAMPLED_BIT and VK_IMAGE_USAGE_TRANSFER_DST_BIT usages. The format of the image depends on the case, but usually a VK_FORMAT_R8G8B8A8_UNORM would be a good choice. The created sampler must use a VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_EDGE addressing mode for all sampling ...
