textures - Pass more than 4-channel data to OpenGL or Vulkan -


i pass following values texture fragment shader:

  • base r
  • base g
  • base b
  • material switch (metal/dielectric)
  • normal x
  • normal y
  • normal z
  • ior (only dielectric)
  • roughness

that lot of stuff. looks require 3 different textures in opengl. questions:

  • are there extensions opengl makes possible pass 1 texture?
  • from have understood vulkan, gpu memory more accessible. mean can use generalized texture formats?

even in vulkan, can not have more 4 channels texture. however, both in opengl , vulkan, use 32 bits channels texture, , use packunorm( https://www.khronos.org/registry/opengl-refpages/gl4/html/packunorm.xhtml ). works integer texture , have perform filtering yourself

another way use ssbo ou tbo. not understand problem using 3 textures.


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