MPTmulti purpose toolone viewer for everything in the shot
demov0.8.1 · beta

mpt --about

review viewer for vfx, motion & 3d

One viewer for everything in the shot.

Camera raw, ProRes, EXR and DPX sequences, USD scenes, VDB sims — MPT opens all of it in one window, on one transport, through one colour pipeline you can trust. Built for comp, lighting, FX, motion design and grade.

request --beta — request beta accessls formats/ — every format MPT reads
in beta onwindowsmacos apple siliconlinux appimage

mptfetch

os
windows · macos · linux
version
0.8.1-beta
lang
c++20 · qt rhi
gfx
d3d11 · metal · opengl
debayer
cuda · opencl · metal
ray
hdRt optix/metal · embree
colour
ocio 2.5 · aces 2.0
3d
openusd 26 · hydra storm
shot_hdr10_uhd.movvideo · prores · hdr10 · bt.2390 to sdr
An HDR10 frame from the anime film Sol Levante, a figure wreathed in fire, playing in MPT with the HDR tone-mapping settings shown across the top of the viewer.

“Sol Levante”, Netflix Open Content · CC BY 4.0

mpt open ./card ./render ./scene

The camera card, the render, the scene. One window.

Drop in a ProRes master, a multi-layer EXR render, or the USD scene it came from: the same scopes, the same grade, the same timecode. Switching file type does not mean switching tools.

shot_v025.mp4 — video · hevc, in the colour workspace

A warm interior shot from the short film BA playing in MPT, with the HDR tone-mapping settings and source peak brightness shown across the top of the viewer.

Every standard FFmpeg codec, no allow-list. ProRes at full 10/12-bit with alpha, hardware decode on every platform, reverse long-GOP, HLS.

.mov .mxf .mp4 .mkv .apv · ProRes · DNxHR · AV1

“BA”, a short film by Duarte Gandum

rock_scan.fbx — 3d · fbx, in the 3d workspace

A photogrammetry rock formation loaded from FBX in MPT's 3D viewport.

OpenUSD on Hydra Storm, Alembic, FBX, .bgeo, OpenVDB, splats (experimental), MaterialX — on the same transport as a clip, ray traced on the GPU.

.usd .abc .fbx .bgeo .vdb .mtlx .splat

Who it's for, and what opens

mpt --for· who it's for · what openspick a seat

~/seats/comp

Compositor

.exr multi-partAOVs on [ ]Cryptomatte Alt+clickProRes 4444 alphaA/B wipe · difference

Export the frame as a scene-linear EXR for the plate — and every export carries the view LUT, so it matches the screen.

review workspace

~/seats/lookdev

Lighting & lookdev

.usd .usdzMaterialXUDIMvariantsnormals · UV · primvar viewsHDRI lighting

Ray trace it on the GPU — OptiX or Metal — with depth of field, at interactive rates.

3d workspace

~/seats/fx

FX

.vdb fog · pyro · level-set.vdb sequences.bgeo without Houdinisplats (experimental)

Blackbody fire and self-shadowing sliders, live, per grid; real multiple scattering under the GPU tracer.

3d workspace

~/seats/motion

Motion design

ProResH.264 · HEVC · AV1DNxHREXR with AOVssafe areas · desqueezescopes

Point it at the render folder: frames play as they land, AOVs one key away, optical-flow motion blur for the preview.

motion blur from render motion vectors · comingreview workspace

~/seats/dit

Colourist & DIT

.r3d .braw .nevCinemaDNGS-Log3 · LogC4 · V-LogHDR10 · HLG · DoVi P8 metadataBT.2390

4K REDCODE in real time, colour that matches RED’s own tools, and a PQ peak that is measured, not assumed.

colour workspace

~/seats/td

Pipeline TD

CLIOCIO incl. ACES 2.0.mptprefs rolloutenv-var precedenceGPU pinningportable sessions

One house default, pushed to every workstation — on Windows, macOS and Linux.

specs workspace
clip_001.r3d8192×4320 · 23.976 · cuda

mpt bench --r3d 4k

No transcode step.

Camera-original raw opens like any other file — debayered on the GPU (CUDA, OpenCL or Metal) and delivered straight into ACES AP0. On Apple silicon the whole raw path is Metal, end to end.

cpu path89.6 ms / frame

zero-copy gpu23.6 ms / frame

~11 → ~42 fpsbit-identical to cpu

full-resolution 4K REDCODE · default zero-copy path · CUDA

REDCODE .r3d
Negative, RED Graded or RED Display — RED’s own output transform on every route, so Display matches REDCINE-X.
BRAW
GPU decode on all three platforms, clip metadata and embedded look applied.
N-RAW · CDNG
N-RAW plays on the same path as REDCODE; numbered .dng runs play as clips.
raw stills
Every major vendor through LibRaw into ACES AP0; a Develop sidecar, original untouched.

mpt --deps

Built on the standards your pipeline already uses.

Native C++20 on Qt RHI — the same colour and display code on Direct3D 11, Metal and OpenGL. The colour pipeline, scopes, OCIO, sessions and audio carry zero platform guards.

OpenUSDOpenEXROpenColorIOOpenVDBOpenImageIOMaterialXAlembicOpenAPVEmbreeOpen Image DenoiseLibRawFFmpeg
tail -f~/.mpt/session.log· simulated