{"id":2209,"date":"2025-01-05T14:25:39","date_gmt":"2025-01-05T05:25:39","guid":{"rendered":"https:\/\/remoooo.com\/?p=2209"},"modified":"2025-01-05T18:37:20","modified_gmt":"2025-01-05T09:37:20","slug":"hair-rendering-with-mitsuba-3-english","status":"publish","type":"post","link":"https:\/\/remoooo.com\/en\/hair-rendering-with-mitsuba-3-english\/","title":{"rendered":"Hair Rendering with Mitsuba 3 (English) Unfinished\u2026"},"content":{"rendered":"

Mitsuba3 provides SOTA for pbr. This article focuses on using Mitsuba's principled_hair<\/code> BSDF and custom adjustments for high-fidelity hair rendering.<\/p>\n\n\n\n

Firstly, defining the scene and hair BSDF. <\/p>\n\n\n\n

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import<\/span> mitsuba <\/span>as<\/span> mi<\/span><\/span>\nmi.set_variant(<\/span>'cuda_rgb'<\/span>)<\/span><\/span>\n<\/span>\n# Define the hair scene with a principled hair BSDF<\/span><\/span>\nscene_dict = {<\/span><\/span>\n    <\/span>"type"<\/span>: <\/span>"scene"<\/span>,<\/span><\/span>\n    <\/span>"integrator"<\/span>: {<\/span>"type"<\/span>: <\/span>"volpath"<\/span>},<\/span><\/span>\n    <\/span>"sensor"<\/span>: {<\/span><\/span>\n        <\/span>"type"<\/span>: <\/span>"perspective"<\/span>,<\/span><\/span>\n        <\/span>"film"<\/span>: {<\/span>"type"<\/span>: <\/span>"hdrfilm"<\/span>, <\/span>"width"<\/span>: <\/span>1024<\/span>, <\/span>"height"<\/span>: <\/span>768<\/span>}<\/span><\/span>\n    },<\/span><\/span>\n    <\/span>"hair_object"<\/span>: {<\/span><\/span>\n        <\/span>"type"<\/span>: <\/span>"ply"<\/span>,<\/span><\/span>\n        <\/span>"filename"<\/span>: <\/span>"..\/scenes\/hair_model.ply"<\/span>,<\/span><\/span>\n        <\/span>"bsdf"<\/span>: {<\/span><\/span>\n            <\/span>"type"<\/span>: <\/span>"principled_hair"<\/span>,<\/span><\/span>\n            <\/span>"melanin_concentration"<\/span>: <\/span>0.6<\/span>,<\/span><\/span>\n            <\/span>"sigma_a"<\/span>: [<\/span>0.1<\/span>, <\/span>0.05<\/span>, <\/span>0.02<\/span>],<\/span><\/span>\n            <\/span>"roughness"<\/span>: <\/span>0.3<\/span>,<\/span><\/span>\n            <\/span>"azimuthal_roughness"<\/span>: <\/span>0.2<\/span><\/span>\n        }<\/span><\/span>\n    },<\/span><\/span>\n    <\/span>"light"<\/span>: {<\/span><\/span>\n        <\/span>"type"<\/span>: <\/span>"point"<\/span>,<\/span><\/span>\n        <\/span>"intensity"<\/span>: {<\/span>"type"<\/span>: <\/span>"spectrum"<\/span>, <\/span>"value"<\/span>: <\/span>150.0<\/span>},<\/span><\/span>\n        <\/span>"position"<\/span>: [<\/span>2.0<\/span>, <\/span>2.0<\/span>, <\/span>2.0<\/span>]<\/span><\/span>\n    }<\/span><\/span>\n}<\/span><\/span>\n<\/span>\n# Load and render the scene<\/span><\/span>\nscene = mi.load_dict(scene_dict)<\/span><\/span>\nimage = mi.render(scene, <\/span>spp<\/span>=<\/span>512<\/span>)<\/span><\/span>\n<\/span>\n# Display the rendered image<\/span><\/span>\nimport<\/span> matplotlib.pyplot <\/span>as<\/span> plt<\/span><\/span>\nplt.axis(<\/span>'off'<\/span>)<\/span><\/span>\nplt.imshow(image ** (<\/span>1.0<\/span> \/ <\/span>2.2<\/span>))<\/span><\/span>\nplt.show()<\/span><\/span><\/code><\/pre>Python<\/span><\/div>\n\n\n\n
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Mitsuba3 provides SOTA for pbr. This article focuses on […]<\/p>","protected":false},"author":1,"featured_media":2210,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[53],"tags":[],"class_list":["post-2209","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tech"],"_links":{"self":[{"href":"https:\/\/remoooo.com\/en\/wp-json\/wp\/v2\/posts\/2209","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/remoooo.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/remoooo.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/remoooo.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/remoooo.com\/en\/wp-json\/wp\/v2\/comments?post=2209"}],"version-history":[{"count":3,"href":"https:\/\/remoooo.com\/en\/wp-json\/wp\/v2\/posts\/2209\/revisions"}],"predecessor-version":[{"id":2238,"href":"https:\/\/remoooo.com\/en\/wp-json\/wp\/v2\/posts\/2209\/revisions\/2238"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/remoooo.com\/en\/wp-json\/wp\/v2\/media\/2210"}],"wp:attachment":[{"href":"https:\/\/remoooo.com\/en\/wp-json\/wp\/v2\/media?parent=2209"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/remoooo.com\/en\/wp-json\/wp\/v2\/categories?post=2209"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/remoooo.com\/en\/wp-json\/wp\/v2\/tags?post=2209"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}