Three validation errors fixed:
1. vkCmdCopyImageToBuffer inside render pass → moved AFTER vkCmdEndRendering
2. Swapchain images missing TRANSFER_SRC usage → added to swapchain creation
3. Wrong layout transitions → ColorAttachment→TransferSrc→copy→ColorAttachment
Architecture change:
- CaptureFrame now only records commands (returns null)
- ReadCapturedBuffer called at start of NEXT frame (after WaitFrame/fence)
GPU has finished by then, safe to map memory
- CapturedFrame available 1 frame late (acceptable for video)
- Image transitions: ColorAttachmentOptimal→TransferSrcOptimal→ColorAttachmentOptimal
(present transition still works because image is back in ColorAttachmentOptimal)
- All 3 lights: intensity 8.0, range 15.5 (was 12/8/8, 60/40/40)
- Copy Parameters: also logs to console for debugging
- Clipboard text via ImGui.SetClipboardText (standard API)
emil28092005