OSL

Reflector
Advanced reflections.
reflector_sphere1_flt
Page:
http://www.rensheeren.com/blog/osl-reflector/
Download links:
http://www.rensheeren.com/osl/reflector_tex_v002.osl
http://www.rensheeren.com/osl/rhfunctions.h
Save both in the same folder, both are needed for the shader to work. Overwrite rhfunctions.h if asked.

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ShowUDIM
Shows where you are in UV/UDIM space! In text!
showudim_rndr2
Page:
http://www.rensheeren.com/blog/osl-show-udim/
Download links:
http://www.rensheeren.com/osl/showUDIM_tex_v001.osl
http://www.rensheeren.com/osl/rhfunctions.h
Save both in the same folder, both are needed for the shader to work. Overwrite rhfunctions.h if asked.

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Merge2
Merge or blend two inputs using several different operations.
merge2_rndr1
Page:
http://www.rensheeren.com/blog/osl-merge2/
Download link:
http://www.rensheeren.com/osl/merge2_tex_v001.osl

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CamMapScale
A fix for the annoying CamMapPerPixel scaling feature in max.
cammapscale_rndr
Page:
http://www.rensheeren.com/blog/osl-cammapscale/
Download link:
http://www.rensheeren.com/osl/camMapScale_tex_v001.osl

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MixNormalMaps
Blend normal maps together… correctly.
mixnormalmaps_rndr
Page:
http://www.rensheeren.com/blog/osl-mixnormalmaps/
Download links:
http://www.rensheeren.com/osl/mixNormalMaps_tex_v003.osl
http://www.rensheeren.com/osl/rhfunctions.h
Right-click and save both in the same folder, both are needed for the shader to work. Overwrite rhfunctions.h if asked.

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ChannelSwitcher
Shuffle or mix channels.
channelswitcher_rndr
Page:
http://www.rensheeren.com/blog/osl-channelswitcher/
Download link:
http://www.rensheeren.com/osl/channelSwitcher_tex_v002.osl
Right-click and save as.

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UVTransform
Transform textures by moving the UV space around.
uvtransform_rndr
Page:
http://www.rensheeren.com/blog/osl-uvtransform/
Download link:
http://www.rensheeren.com/osl/UVTransform_tex_v002.osl
Right-click and save as.

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ArchGlass
Simulate multi-paned window glass with only a single-sided plane object.
archglass_rndr
Page:
http://www.rensheeren.com/blog/osl-archglass/
Download links:
http://www.rensheeren.com/osl/archGlass_mat_v002.osl
http://www.rensheeren.com/osl/rhfunctions.h
Right-click and save both in the same folder, both are needed for the shader to work. Overwrite rhfunctions.h if asked.