Ive had Maya 5 installed for a few weeks now and just recently when i open Maya it dispays the message // Warning: The preferred renderer, mentalRay, is not currently available. The Maya Software renderer will be used instead. // Originally Posted by Yet I open a file that I was working on last week using the Mental Ray renderer and it then appears in the menu. pv_performAction "D:/Portfolio/Maya3D/balls.mb" "Best Guess"; file -f -options "v=0;p=17" -typ "mayaBinary" -o "D:/Portfolio/Maya3D/balls.mb";addRecentFile("D:/Portfolio/Maya3D/balls.mb", "mayaBinary"); requires "Mayatomr" "5.0.0.103m - 3.2.2.1 "; // mental ray for Maya 5 // mental ray for Maya: using startup file C:/Program Files/AliasWavefront/Maya5.0/mentalray/maya.rayrc // mental ray for Maya: setup // mental ray for Maya: initialize // mental ray for Maya: using 1 license // mental ray for Maya: register extensions // mental ray Node Factory: loaded // generating nodes ... // parsing C:/Program Files/AliasWavefront/Maya5.0/mentalray/include/base.mi // mib_texture_vector // mib_texture_remap // mib_texture_rotate // mib_bump_basis // mib_bump_map // mib_passthrough_bump_map // mib_lookup_spherical // mib_lookup_cube1 // mib_lookup_cube6 // mib_lookup_background // mib_lookup_cylindrical // mib_texture_lookup // mib_texture_filter_lookup // mib_texture_checkerboard // mib_texture_polkadot // mib_texture_polkasphere // mib_texture_turbulence // mib_texture_wave // mib_reflect // mib_refract // mib_transparency // mib_opacity // mib_twosided // mib_refraction_index // mib_dielectric // mib_ray_marcher // mib_illum_lambert // mib_illum_phong // mib_illum_ward // mib_illum_ward_deriv // mib_illum_blinn // mib_illum_cooktorr // mib_illum_hair // mib_volume // mib_color_alpha // mib_color_average // mib_color_intensity // mib_color_interpolate // mib_color_mix // mib_color_spread // mib_geo_cube // mib_geo_torus // mib_geo_sphere // mib_geo_cone // mib_geo_cylinder // mib_geo_square // mib_geo_instance // mib_geo_instance_mlist // mib_geo_add_uv_texsurf // mib_photon_basic // mib_light_infinite // mib_light_point // mib_light_spot // mib_shadow_transparency // mib_lightmap_write // mib_lightmap_sample // generating nodes ... // parsing C:/Program Files/AliasWavefront/Maya5.0/mentalray/include/contour.mi // contour_store_function // contour_store_function_simple // contour_contrast_function_levels // contour_contrast_function_simple // contour_shader_simple // contour_shader_randomwidth // contour_shader_randomtransparency // contour_shader_curvature // contour_shader_factorcolor // contour_shader_depthfade // contour_shader_framefade // contour_shader_layerthinner // contour_shader_widthfromcolor // contour_shader_widthfromlightdir // contour_shader_widthfromlight // contour_shader_combi // contour_only // contour_composite // contour_ps // generating nodes ... // parsing C:/Program Files/AliasWavefront/Maya5.0/mentalray/include/physics.mi // physical_lens_dof // physical_light // dgs_material // dgs_material_photon // dielectric_material // dielectric_material_photon // oversampling_lens // path_material // parti_volume // parti_volume_photon // transmat // transmat_photon // mental ray for Maya: successfully registered // File read in 0 seconds. // Warning: line 1: The surface of rigid body 'rigidBody5' may be reversed. Reversing the surface may avoid interpenetration errors. // // Warning: line 1: The surface of rigid body 'rigidBody6' may be reversed. Reversing the surface may avoid interpenetration errors. // // Result: 1 // // Warning: The surface of rigid body 'rigidBody5' may be reversed. Reversing the surface may avoid interpenetration errors. // updateRendererUI; Originally Posted by Any ideas why it would do that ?