René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Strange shadow artifacts show up in VR HMD","articleBody":"We're a VR HMD manufacturer and we've been connected our own headset to the OSVR with a custom plugin.\nWhen we use the OSVR-Unity package to develop a demo content, we inspected some shadow artifacts only showing up in the headset.\n\nThis image is the preview window in Unity, and there are no artifacts.\n![preview](https://cloud.githubusercontent.com/assets/5366582/14738636/59b9afba-08b5-11e6-9de9-88769b5d21c1.jpg)\n\nThe same scene shot through the headset's lens, there are shadows on the cloud.\n![bad1](https://cloud.githubusercontent.com/assets/5366582/14738671/8cd0ee22-08b5-11e6-9d1e-54e145f52f00.jpg)\n\nAnd even stranger, when the headset pitches up gradually, the shadows disappear one-by-one, as below.\n![bad2](https://cloud.githubusercontent.com/assets/5366582/14738827/5d229d5a-08b6-11e6-866b-3ce86570ad96.jpg)\n![bad3](https://cloud.githubusercontent.com/assets/5366582/14738831/62a0c1ee-08b6-11e6-99e4-2ff93fafba04.jpg)\n![bad4](https://cloud.githubusercontent.com/assets/5366582/14738835/6c5c7cb4-08b6-11e6-9fe5-a5bb43e9aada.jpg)\n\nOur server config:\n\n```\n{\n    \"display\": \"displays/xxxx.json\",\n\n    \"server\": {\n        \"sleep\": 1 \n    },\n\n    \"renderManagerConfig\": {\n        \"meta\": {\n            \"schemaVersion\": 1\n        },\n        \"renderManagerConfig\": {\n            \"directModeEnabled\": false,\n            \"directDisplayIndex\": 0,\n            \"directHighPriorityEnabled\": true,\n            \"numBuffers\": 2,\n            \"verticalSyncEnabled\": true,\n            \"verticalSyncBlockRenderingEnabled\": false,\n            \"renderOverfillFactor\": 1.0,\n\n            \"window\": {\n                \"title\": \"xxxx\",\n                \"fullScreenEnabled\": true,\n                \"xPosition\": 1920,\n                \"yPosition\": 0\n            },\n\n            \"display\": {\n                \"rotation\": 0,\n                \"bitsPerColor\": 8\n            },\n\n            \"timeWarp\": {\n                \"enabled\": true,\n                \"asynchronous\": false,\n                \"maxMsBeforeVSync\": 5\n            }\n        }\n    }\n}\n```\n\nOur display config:\n\n```\n{\n  \"meta\": {\n    \"schemaVersion\": 1\n  },\n  \"hmd\": {\n    \"device\": {\n      \"vendor\": \"xxxx\",\n      \"model\": \"xxxx\",\n      \"num_displays\": 1,\n      \"Version\": \"1.0\",\n      \"Note\": \"\"\n    },\n    \"field_of_view\": {\n      \"monocular_horizontal\": 100.0,\n      \"monocular_vertical\": 112.5,\n      \"overlap_percent\": 100,\n      \"pitch_tilt\": 0\n    },\n    \"resolutions\": [\n      {\n        \"width\": 2560,\n        \"height\": 1440,\n        \"video_inputs\": 1,\n        \"display_mode\": \"horz_side_by_side\",\n        \"swap_eyes\": 0\n      }\n    ],\n    \"distortion\": {\n        \"type\": \"rgb_symmetric_polynomials\",\n        \"distance_scale_x\": 1,\n        \"distance_scale_y\": 1.125,\n        \"polynomial_coeffs_red\":   [ xxxx ],\n        \"polynomial_coeffs_green\": [ xxxx ],\n        \"polynomial_coeffs_blue\":  [ xxxx ]\n    },\n    \"rendering\": {\n      \"right_roll\": 0,\n      \"left_roll\": 0\n    },\n    \"eyes\": [\n      {\n        \"center_proj_x\": 0.6,\n        \"center_proj_y\": 0.5,\n        \"rotate_180\": 0\n      },\n      {\n        \"center_proj_x\": 0.4,\n        \"center_proj_y\": 0.5,\n        \"rotate_180\": 0\n      }\n    ]\n  }\n}\n\n```\n\nSpec:\n\ni7-4790k\nNVIDIA GTX970\nWindows 7 64bit\nUnity3D 5.3.1f1\nOSVR-Unity-v0.6.8-with-core-v0.6-1186-gacfbf41-build369\n","author":{"url":"https://github.com/ccll","@type":"Person","name":"ccll"},"datePublished":"2016-04-22T10:24:06.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":7},"url":"https://github.com/17/OSVR-Unity-Rendering/issues/17"}