O Blender é um aplicativo gratuito de nível profissional, onde a matemática não é particularmente necessária, mas pode ser usada com bons resultados, e seus requisitos mínimos não são tão excessivos (minha cópia do Blender é executada em um Dell 380 de no máximo 20 anos):
Hardware mínimo (uso básico)
CPU dual core de 2 GHz e 32 bits com suporte a SSE2.
2 GB de RAM
Tela de 12 bits 1280 × 768
Mouse ou trackpad
Placa gráfica OpenGL 2.1 compatível com 512 MB de RAM
Hardware recomendado
Hardware ideal (grau de produção)
CPU de oito núcleos de 64 bits
16 GB de RAM
Dois monitores full HD com cores de 24 bits
Mouse com três botões e mesa digitalizadora
Placas gráficas duplas compatíveis com OpenGL 3.2 com 4 GB de RAM
Se você gosta de codificar, as bibliotecas Python e C também estão disponíveis.
Além disso, existe um site StackExchange dedicado ao Blender , que é útil.
Como comparação, do Melhor Software de Design 3D / Modelagem 3D 2019 (15 de 30 são gratuitos) , esta lista comparativa pode ser útil
Name Level OS Price Formats
3D Slash Beginner Windows, Mac, Linux, Raspberry Pi or Browser Free, 24$/year Premium 3dslash, obj, stl
LibreCAD Beginner Windows, macOS and Linux Free dxf, dwg
Photoshop CC Beginner Windows and Mac 142€/year 3ds, dae, kmz, obj, psd, stl, u3d
SculptGL Beginner Browser Free obj, ply, sgl, stl
SelfCAD Beginner Browser Free 30-day trial, 9.99$/month stl, mtl, ply, dae, svg
TinkerCAD Beginner Browser Free 123dx, 3ds, c4d, mb, obj, svg, stl
Clara.io Intermediate Browser Free, Premium from 100$/year 3dm, 3ds, cd, dae, dgn, dwg, emf, fbx, gf, gdf, gts, igs, kmz, lwo, rws, obj, off, ply, pm, sat, scn, skp, slc, sldprt, stp, stl, x3dv, xaml, vda, vrml, x_t, x, xgl, zpr
DesignSpark Intermediate Windows Freemium, 835$ (All Addons) rsdoc, dxf, ecad, idf, idb, emn, obj, skp, STL, iges, step
FreeCAD Intermediate Windows, Mac and Linux Free step, iges, obj, stl, dxf, svg, dae, ifc, off, nastran, Fcstd
MakeHuman Intermediate Windows, Mac, Linux Free dae, fbx, obj, STL
Meshmixer Intermediate Windows, Mac and Linux Free amf, mix, obj, off, stl
MoI Intermediate Windows and Mac 266€ 3ds, 3dm, dxf, fbx, igs, lwo, obj, skp, stl, stp and sat
nanoCAD Intermediate Windows Freemium, 180$/year sat, step, igs, iges, sldprt, STL, 3dm, dae, dfx, dwg, dwt, pdf, x_t, x_b, xxm_txt, ssm_bin
OpenSCAD Intermediate Windows, Mac and Linux Free dxf, off, stl
Sculptris Intermediate Windows and Mac Free obj, goz
SketchUp Intermediate Windows and Mac Free, 240$ Pro dwg, dxf, 3ds, dae, dem, def, ifc, kmz, stl
3ds Max Professional Windows 1505$/year, Edu. licenses av. stl, 3ds, ai, abc, ase, asm, catproduct, catpart, dem, dwg, dxf, dwf, flt, iges, ipt, jt, nx, obj, prj, prt, rvt, sat, skp, sldprt, sldasm, stp, vrml, w3d xml
AutoCAD Professional Windows and Mac 1575$/year dwg, dxf, pdf
Blender Professional Windows, Mac and Linux Free 3ds, dae, fbx, dxf, obj, x, lwo, svg, ply, stl, vrml, vrml97, x3d
Cinema 4D Professional Windows, macOS 3695$ 3ds, dae, dem, dxf, dwg, x, fbx, iges, lwf, rib, skp, stl, wrl, obj
modo Professional Windows, macOS, Linux 1799$ lwo, abc, obj, pdb, 3dm, dae, fbx, dxf, x3d, geo, stl
Mudbox Professional Windows and Mac 85€/year fbx, mud, obj
Onshape Professional Windows, Mac, Linux, iOS, Android 2400€/year, free and price reduced business version available sat, step, igs, iges, sldprt, stl, 3dm, dae, dfx, dwg, dwt, pdf, x_t, x_b, xxm_txt, ssm_bin
Poser Professional Windows, Mac Standard 129.99$, Pro 349.99$ cr2, obj, pz2
Rhino3D Professional Windows and Mac 495€ Educational, 995€ Commercial 3dm, 3ds, cd, dae, dgn, dwg, emf, fbx, gf, gdf, gts, igs, kmz, lwo, rws, obj, off, ply, pm, sat, scn, skp, slc, sldprt, stp, stl, x3dv, xaml, vda, vrml, x_t, x, xgl, zpr
ZBrush Professional Windows and Mac 400€ Educational, 720€ Single User dxf, goz, ma, obj, stl, vrml, x3d
CATIA Industrial Windows 7180€; Edu. licenses av. 3dxml, catpart, igs, pdf, stp, stl, vrml
Fusion 360 Industrial Windows and Mac 499.80€/year, Edu. licenses av. catpart, dwg, dxf, f3d, igs, obj, pdf, sat, sldprt, stp
Inventor Industrial Windows and Mac 1935$/year 3dm, igs, ipt, nx, obj, prt, rvt, sldprt, stl, stp, x_b, xgl
Solidworks Industrial Windows 9950€, Edu. licenses available 3dxml, 3dm, 3ds, 3mf, amf, dwg, dxf, idf, ifc, obj, pdf, sldprt, stp, stl, vrml