Doomsday Manual

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This article contains tips about optimizing [[doomsday]] for older hardware.


====== Slow CPU ======


Disabling or lowering these CPU-intensive settings will help improve performance on slow CPUs.

  *  Disable [[3_d_model]]s.
  *  Disable simulated radiosity ([[fake_radio]]). Set the cvar //[[rend-fakeradio]]// to zero.
  *  Disable [[particle_effect]]s or lower the value of the //[[rend-particle-rate]]// cvar.
  *  Disable [[dynamic_light]]s. Set the //[[rend-light]]// cvar to zero.


====== Slow graphics card ======


Disabling or lowering these GPU-intensive settings will help improve performance with old graphics accelerators.

  *  Using paletted textures will save texture memory and make texture reloads less frequent. Enable with the *-paltex* option.
  *  Disable smart filtering of textures. Smart filtering significantly increases the size of all textures. Disabling it will help conserve texture memory.
  *  Disable simulated radiosity (FakeRadio). Set the cvar _rend-fakeradio_ to zero.
  *  Disable dynamic lights or reduce the size of dynamic lights.
  *  Use additive blending for dynamic lights instead of multiplicative blending.
  *  Disable particle effects or lower the value of the _rend-particle-rate_ cvar.
  *  Disable detail textures.
  *  Don't use high-resolution textures.
  *  Disable anti-aliasing in the graphics adapter's driver settings.
  *  Use a lower display resolution.
  *  Use a 16-bit video mode.
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